(do you) know something

are you aware of something.

You know something? Drinking and driving don't mix!

Know something? I'm pretty disgusted with you!

• the big daddy
• the bigger they are, the harder they fall.
• the big picture
• the big smoke
• the big time
• the bird has flown.
• the birds and the bees
• the biter bit
• the biter is bit
• the bitter fruits
• the black sheep
• the black sheep of the family
• the blind leading the blind
• the blue blazes
• the boot is on the other foot
• the bottom drops out of the market
• the bottom falls out of the market
• the bottom fell out
• the bottom fell out of
• the bottom fell out of something
• the bottom line
• the bottom of the barrel
• the bottom of the heap
• the bottom of the hour
• the bottom of the ladder