Definition (身體)
A vulgar way to refer to you or yourself, him or himself, me or myself, etc.
你屁股（粗俗用語）
Get your ass into my office right now!
立刻給我滾進辦公室！
I should sue his ass for slander.
我應該告他誹謗。
She'd better get her ass over here quickly, or she'll be in trouble!
她最好趕快過來，否則她會有麻煩！