| Idiom | Meaning | Example | 
| bust my butt | 
work very hard, work my fingers to the bone
 | 
She busts her butt to earn a good wage, and he spends it.
 | 
| bust out | 
escape, get away, break out
 | 
Hey, man. I can bust out of here if you have a rope.
 | 
| busted | 
charged by the police, arrested
 | 
Shane got busted for trafficking. He sold cocaine to some kids.
 | 
| busy as a beaver | 
(See as busy as a beaver)
 | 
 | 
| but good | 
completely, thoroughly, and how
 | 
If somebody hurts her, she'll get revenge, but good!
 | 
| butt | 
buttocks, backside, bum
 | 
If you tell anybody that I like her, I'll kick your butt.
 | 
| butt in | 
intrude, interrupt
 | 
When a salesman butts in, tell him to butt out.
 | 
| butt of the joke | 
(See the butt of the joke)
 | 
 | 
| butt out | 
go away, beat it, get lost
 | 
We asked him to butt out so we could have a private talk.
 | 
| butter fingers | 
unable to catch or hold, cement hands
 | 
When Anna dropped the ball, Shelly said, "Butter fingers!"
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