Kick ass 打某人
I'll kick your ass if I ever see you talking to my girlfriend again.
Kick ass 打败，击败
We were not prepared for that game, and the other team kicked our asses.
Kick ass 牛X，很厉害
That move kicked ass! You should see it!
Kick-ass adj. 牛X的，厉害的
That was a real kick-ass party you had the other night!
Kick ass 激励，鞭策
It looks like I’m going to have to kick ass to get people moving around here.