Snot Bubble

In manga and anime, a character is drawn with a snot bubble coming out of their nose when they're sleeping, taking a nap, or just dozing off, sleepy.

This is called hana-chouchin 鼻提灯 in Japanese: hana 鼻 means "nose," and chouchin 提灯 means "paper lantern."

Character: Miyauchi Kazuho 宮内一穂,
Anime: Non Non Biyori のんのんびより (Episode 2)

• Examples

Examples

Left: Reina レーナ
Right: Mile マイル
Anime: Watashi, Nouryoku wa Heikinchi de tte Itta yo ne! 私、能力は平均値でって言ったよね！ (Episode 10)

• 3 eyes are another sleeping symbol.

Beware the bubble isn't snot, but the character's soul coming out of their mouth.

Character: Hasuta ハス太
Anime: Haiyore! Nyaruko-san 這いよれ！ニャル子さん (Episode 7)