Translation of "Butt" in Japanese

Your butt.

お尻(しり)もね

My butt hurts.

ケツが痛い。

I'll kick your butt!

ぶっ飛ばしてやる！

Get off your butt and do something!

ぶらぶらしないで、何とかしなさい！

The cause of the fire was his cigarette butt.

火事の原因は彼のタバコの火の不始末だ。

Spoiler alert: that one will come back to bite you in the butt.

結論を先に明かします これはしっぺ返しを食らいます

There's no need for you to butt in. Just let him do this on his own.

お前がでしゃばることはない。あいつにやらせればいいんだ。

There are things I'd like to say but to butt in now would be what they call uncouth.

・・・言いたいことは色々あるのだが、ここで口を挟むのは野暮というもの。

Hey, we're trying to have a serious discussion here so I'd appreciate it if you wouldn't butt in so irresponsibly.

ふたりでまじめな話をしているんだから、君、無責任な横槍を入れないでほしいんだけど。

- I'll punch your lights out!
- I'll beat you up!
- I'll kick your butt!
- I'll slap the living daylights out of you!
- I'll smack the living daylights out of you!

ぶっ飛ばしてやる！