| Idiom | Meaning | Example | 
| blind date | 
going out with a boy or girl you have not met
 | 
Kate met Jeff on a blind date. They got married a year later.
 | 
| blind leading the blind | 
(See the blind leading the blind)
 | 
 | 
| blood from a stone | 
(See get blood from a stone)
 | 
 | 
| blood is thicker than water | 
blood relationships are stronger than a marriage ceremony
 | 
When my wife supported her dad in a fight with me, I said, "So blood is thicker than water."
 | 
| blood is up | 
excited, angry, ready to fight
 | 
Kerry is friendly, but when his blood is up, he's dangerous.
 | 
| blood money | 
money paid to the relative of a murdered person, dirty money
 | 
The widow refused to take blood money from the men who murdered her husband.
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| bloody well | 
very truly, damn well
 | 
He bloody well knows my name because I bloody well told him.
 | 
| blotto | 
exhausted, bushed
 | 
After studying for twelve hours, she was blotto - very tired.
 | 
| blow a bundle | 
spend a lot of money, lose a lot of money gambling
 | 
When Al went to Vegas, he blew a bundle - he lost a lot of money.
 | 
| blow a kiss | 
kiss your hand and blow across it, throw a kiss
 | 
Taea can blow a kiss, and she's only eighteen months old!
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