bukkake ぶっかけ

In Japanese, bukkake ぶっかけ means "splashing" or "pouring" something onto something, specially with force. For example: throwing water from a bucket at someone.

In English, the term bukkake basically always refers to pornography (including hentai) featuring copious amounts of semen being poured onto someone, to the point they become covered in semen.

Meaning
- Kanji

Meaning

Due to the way the word is used in English it's easy to think that bukkake is a nasty word, but it isn't. The word itself has nothing to do with sex.

Notably, a bukkake udon ぶっかけうどん is a dish made by "pouring" broth onto udon noodles. The broth doesn't contain semen. If it does, there's something very wrong going on in the kitchen.

Morphologically, bukkake comes from the word:

bukkakeru
ぶっかける
To splash [something] onto [someone] with force.

Which is a compound verb:

kakeru
かける
To cover [someone] with [something]. (among other meanings.)
bu'
ぶっ
(prefix used to emphasize force.)
- bukkorosu
  ぶっ殺す
  To kill. (with force.)
- buttobasu
  ぶっ飛ばす
  To send flying. (with force.)

Therefore, bukkakeru literally means "to cover with force," and "pouring" or "splashing" is how you cover something with liquid.

Since kakeru, and by extension bukkakeru, are ichidan verbs, the ren'youkei 連用形 is conjugated simply by removing the ~ru ending:

kake
かけ
The act of covering [something] with [something]. (noun form.)
bukkake
ぶっかけ
The act of covering [something] with [something] with force. (noun form.)

The word bukkake isn't the only noun form of a verb that's known as an pornographic genre in English. Some other examples include:

shibari
縛り
Tying.
[Rope bondage]. (in English.)
- shibaru
  縛る
  To tie. (with rope.)
  To restrain.
netorare
寝取られ
Either "being adulterous" or "having a partner who is adulterous" depending on context.
[Cuckolding]. (In English.)
- From netorareru 寝取られる, passive form of netoru 寝取る, "to sleep with someone else's partner."