| Idiom | Meaning | Example | 
| bundle | 
(See make a bundle)
 | 
 | 
| bundle of nerves | 
(See a bundle of nerves)
 | 
 | 
| bundle up | 
dress warmly, put on winter clothes, rug up
 | 
Be sure to bundle up if you go skating on the lake. It's cold!
 | 
| bunk | 
false statements, rumors, baloney, bull
 | 
They claim that computers can think, but that's a lot of bunk!
 | 
| buns | 
buttocks, bum
 | 
Tony said Rita has great buns.
 | 
| burbs | 
(See the burbs)
 | 
 | 
| burn a hole in your pocket | 
feel that you have to spend your money
 | 
If money burns a hole in your pocket, invest it.
 | 
| burn it in | 
throw the ball hard to the catcher, fastball
 | 
My hand hurts when you throw so hard. Don't burn it in, eh.
 | 
| burn out | 
use too much emotional energy, breakdown
 | 
Working too hard can cause a person to burn out.
 | 
| burn the midnight oil | 
work or study very late at night
 | 
To become a doctor, you have   to burn the midnight oil.
 |