| Idiom | Meaning | Example | 
| booboo | 
(See make a booboo)
 | 
 | 
| boobs [B] | 
breasts, tits
 | 
Okay, she has lovely boobs. What about her personality?
 | 
| boogie | 
go, walk, drive
 | 
Let's boogie on down to the    store and rent a video.
 | 
| book worm | 
one who reads a lot, geek
 | 
Sarah is quite a book worm. She loves to read history books.
 | 
| booked/booked up | 
no more space or rooms, no vacancy
 | 
The Royal Hotel is booked up.   Every room is reserved.
 | 
| boom box | 
portable radio, ghetto blaster
 | 
We can have music at the beach if you bring your boom box.
 | 
| boom or bust | 
either large profits or large losses, rich or poor, feast or famine
 | 
In the oil business, it's boom or bust. Some years it's worth more than gold; other years it isn't worth the cost of production!
 | 
| boot it | 
drive fast, highball it, pedal to the metal
 | 
If you boot it, Betty won't ride with you. She hates going fast.
 | 
| boot up | 
start or switch on a computer
 | 
Wait until I boot up the Mac. Then we can print your letter.
 | 
| bootleg | 
produced illegally, not authorized, software piracy
 | 
If someone offers you bootleg software, don't accept it! You could be sued!
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