In anime, "flat as a board" is a rude way to describe flat-chested characters, who have "small breasts"," hin'nyuu 貧乳.

This everybody knows. What you may not know is that there are two different terms for this in Japanese, depending on the sort of board.

• Cutting Board
• Washboard

In Japanese, sumaki 簀巻き is a method of execution in which someone is rolled up in a bamboo mat and thrown in the river to drown. It may also refer to anime girls being wrapped in blankets like a burrito.

• Meaning
• Examples
• References

In Japanese, hadaka epuron 裸エプロン, literally "naked apron," refers to a situation in which a girl is wearing nothing but an apron, which is a garment normally worn while cooking in the kitchen to protect your clothes from stains. There's no practical purpose in wearing it naked.

• Examples
• References

In Japanese, shinkon santaku 新婚三択, meaning "newly-wed three choices," refers to a scenario in which a newly wed husband arrives home to his newly wed wife, who provides him with three choices:

• Context: Yukimoto Yuzu 雪本柚子 imagines herself as a bride who would support her future husband.
• okaerinasai anata ♡
  おかえりなさいあなた♡
  [Welcome home, dear.]
  • anata
    あなた
    You. (second person pronoun.)
    Sometimes used by a wife to refer to her husband.
• ofuro ni suru?
  gohan ni suru?
  soretomo... wa... ta... shi...?
  お風呂にする？
  ご飯にする？
  それとも･･･わ♡た♡し♡？？
  [What do you want to do]?
  [Eat]? [Take a] bath? Or... me?
  • soretomo watashi
    それとも私
    Or me. (often pronounced with coquettish pauses between syllables.)
  • gohan means a "meal," and can be "lunch" or "dinner." It's normally dinner since the scenario is usually about a husband coming home from work.
  • ni suru にする means to settle on doing something. It doesn't carry a sexual innuendo like "do me" in English. Although suru する alone, "to do [it]," is sometimes an innuendo for "to have sex."

Despite the name, most instances of this scenario do not happen between newly wed couples, or even wed couples, just between any two random characters.

• Examples
• References

In anime, sometimes a character has dark spots under their eyes, usually dark blue, or eye bags, baggy eyes, which are permanent and part of their design.

• In Japanese
• Meaning
• Examples
• References

In anime, sometimes a character's "mouth becomes a 3," kuchi ga san ni naru 口が３になる.

Like this: ・3・.

Not like this: ・ω・. See nekoguchi 猫口 for mouths drawn like 3's rotated.

• Meaning
• Examples
  
  • Pouting
  • Blowing Air
• References

In Japanese, kuro-shirome 黒白目 means "black sclera"—the sclera being the (normally) white part of the eye.

Anime characters with black sclerae are often somehow inhuman. They may demons, cyborgs, androids, or other sort of robot, or have possibly demonic powers which, when activated, change the color of sclerae to black from white, maybe to imply the character has been corrupted.

• Meaning
• Examples
  
  • Transforming
  • Heterochromatic Sclerae
• References

In Japanese, shirome 白目 means literally "white eye," and normally refers to the white part of the eye, the "sclera," kyoumaku 強膜, but can also refer to a character that has fully white eyes..

It's also spelled hakugan 白眼.

• Meaning
  
  • Facial Expression
• Characters

In Japanese, osoroshii ko 恐ろしい子 means "what a terrifying child," or "what a terrifying girl," "what a terrifying guy," "what a terrifying person," and so on.

In manga and anime, osoroshii ko refers to a pose of shock, with eyes drawn completely white, and usually with one's index finger placed across the chin, sometimes drawn in monochrome like manga, accompanied by background effects like lightning or flash lines, used when a character has realized the terrifying capability of somebody.

It originates in the drama shoujo manga, Glass Mask, Garasu no Kamen ガラスの仮面. Today, it's pretty much always used in comedy, often sarcastically. It's become a meme.

In Japanese, nonojinome のの字の目 is a way to describe someone looking to the side, with their iris at the corner of the eye, perhaps averting their eyes from something or someone.

Literally, we're talking about "no" no ji no me 「の」の字の目, meaning "no の character eyes," because when someone looks to the side their eyes look like the no の hiragana character.

• Meaning
• Examples
• References

In Japanese, henohenomoheji へのへのもへじ refers to a face drawn using the hiragana characters he へ for eyebrows and mouth, no の for eyes, mo も for nose, and ji じ for outline, though this last ji じ is often omitted.

It's also called hehenonomoheji へへののもへじ.

• Examples
• References

In anime, sometimes characters' "eyes become 3's," me ga san ni naru 目が３になる. As in, they become drawn as the number 3, the Arabic numeral.

This article is about "3-shaped eyes." Not to be confused with having three eyes instead of two, or having a 3-shaped cat mouth （・ω・）.

• Symbol
• Examples
  • 4 Eyes

In Japanese, gigan 義眼 means a "prosthetic eye," or an "artificial eye," as opposed to an innate one.

• Meaning
• Examples

In Japanese, magan 魔眼, "magic eye," or "demon eye," also called "evil eye," jagan 邪眼, or satirically jakigan 邪気眼, is an eye that has some sort of magical power or ability. Sometimes a cursed, evil, demonic one.

In Japanese, fukugan 複眼, means "compound eyes," as in insect eyes.

• Meaning
• Examples
• References

Polycoria is the medical term for having multiple pupils in a single eye. It's commonly called "double pupils," or "pupula duplex," since it's normally only two pupils.

In Japanese, the common term for polycoria is choudou 重瞳, literally "stacked pupils," and the technical term is is ta-doukou-shou 多瞳孔症, "multiple pupil condition."

In anime, characters with natural double pupils are almost nonexistent. Honestly, I only know one example, and a pretty well-known one, too:

• Examples

In Japanese, tagan 多眼, "many eyes," refers to having three eyes or more.

Warning: if you have trypophobia, you probably don't want to read this article.

• Meaning
• Examples
  • Body
  • Face
  • Literal Numbers

In anime, some characters have three eyes, with the third eye often being in the middle of the forehead, displaying some sort of special power.

Not to be confused with having 3 eyes.

• In Japanese
• Examples
  
  • Homogenous
  • Heterogenous
  • Vertical
  • Symbolic
  • Unusual

In anime, a cyclops girl is an one-eyed monster girl, often with one impossibly large eye in the middle of her head.

The term for cyclops girl in Japanese is tangan-musume 単眼娘, "one-eyed girl," or tangan-shoujo 単眼少女, same meaning. They're also called "monoeye," monoai モノアイ, and hitotsume 一つ目, "one-eyed."

See the article about tangan 単眼 for details.

There are two ways to say "one-eyed" in Japanese:

1. sekigan
   隻眼
   For one-eyed characters that had two eyes, but lost one.
2. tangan
   単眼
   For one-eyed characters that always had one eye, cyclops-like.

In Japanese, tangan 単眼 means "one-eyed," like a cyclops.

See sekigan 隻眼 for "one-eyed" in the sense of having lost one eye.

In Japanese, sekigan 隻眼 means "one-eyed," in the sense that you've lost your other eye.

See tangan 単眼 for having a single eye like a cyclops.

• Meaning
• Styles
  
  • Visible
  • Scar
  • Eye Patch
  • Hair
• Canonicality

In Japanese, kitsune-me キツネ目, "fox eyes," are narrow, upturned eyes, like those of a fox. In anime, characters with fox eyes are normally drawn with them closed, so they end up being a mix of ito-me 糸目 and tsuri-me ツリ目.

It's also spelled kitsune-me 狐目.

• Examples
• References

In Japanese, kin-me gin-me 金目銀眼, "gold eye, silver eye," means a specific type of heterochromia: having one yellow eye and one blue eye.

The reason for such an oddly specific term to exist is that this sort of heterochromia is particularly common in cats and dogs. In anime, cat girls also tend to feature this trait.

In anime, some characters have eyes of different colors. The technical term for that in English is heterochromia, specifically, heterochromia iridis, which is having irises of different colors.

In Japanese, the term for heterochromia in general is its katakanization, heterokuromia ヘテロクロミア. The common term for heterochromatic eyes in anime characters is oddo-ai オッドアイ, "odd eyes."

• In Japanese
• Examples
  
  • Siblings
  • Cats
    
    • 金目銀目
  • Complex
  • Prosthetic
  • Transplant
  • Blindness
  • Magic Eyes
  • Contact Lens
• List of Characters

In anime, some characters's pupils are shaped flowers with four petals, or like crosses with round corners. There doesn't seem to be any well-known term for them, but some people say the shape of these "eyes are clovers," me ga kuroobaa 目がクローバー, so they are clover eyes.

• Examples
• Disambiguation
• References

For the sake of completeness, in anime, when a character becomes wide-eyed and sweating cold, the term for those eyes end up being nekome 猫目, "cat eyes."

• Examples

In anime, sometimes a character's face becomes cat-like in reaction to something. Although there doesn't seem to be an exact term for this cat face in Japanese, it can be referred to by the "cat eyes," nekome 猫目, and "cat mouth," nekoguchi 猫口, featured in this expression.

• Examples
  
  • Kaomoji

In anime, sometimes characters have eyes with vertical slit pupils, reminiscent of "snake eyes." In Japanese, this is called hebime ヘビ目, also spelled hebime 蛇目, hebime 蛇眼.^{(dic.pixiv.net:蛇眼)}

• Context: Rindou with her yellow, vertical-slit pupils.
• moe-sode
  萌え袖
  A term for overly long sleeves that cover the hands.

Sometimes, snake eyes are called "cat eyes" instead, nekome 猫目. The difference tends to be just whether the character looks more like a cat than a snake, which typically means their eyes are yellow, orange, or red-colored.

In anime, sometimes a character's mouth is drawn like the number three rotated, like this: (:3) or this: (´・ω・`). The term for that in Japanese is nekoguchi 猫口, "cat mouth."

• Meaning
• Examples
• ケツみてぇな口しやがって
• References