also: ケツアゴ
noun
cleft chin; butt chin
Slang term for a cleft chin, literally 'butt chin'. Used casually, often in a teasing or humorous way.
See also: あご割れ
彼はケツあごがチャームポイントだ。
His cleft chin is his charm point.
あの俳優のケツあご、かっこいいよね。
That actor's butt chin is cool, isn't it?
Compound of ケツ (slang for 'buttocks') and あご ('chin'), referring to the resemblance of a cleft chin to buttocks.