also: しりのあな
Vulgar term for the anus. Used in crude or insulting contexts. The reading けつのあな is the most common; しりのあな is less frequent and may sound slightly less harsh.
That guy is really a tight-ass.
If you say that, I'll poke your asshole.
Common vulgar spelling using katakana for ケツ and kanji for 穴.
Compound of ケツ (slang for 'buttocks', from 尻) and 穴 ('hole'). The reading けつ is a vulgar variant of しり.