Back Seat Driver:
People who criticize from the sidelines, much like someone giving unwanted advice from the back seat of a vehicle to the driver.
Back To Square One:
Having to start all over again.
Back To The Drawing Board:
When an attempt fails and it's time to start all over.
Barking Up The Wrong Tree:
A mistake made in something you are trying to achieve.
Beat A Dead Horse:
To force an issue that has already ended.
Beating Around The Bush:
Avoiding the main topic. Not speaking directly about the issue.
Bend Over Backwards:
Do whatever it takes to help. Willing to do anything.
Between A Rock And A Hard Place:
Stuck between two very bad options.
Bite Off More Than You Can Chew:
To take on a task that is way to big.
Bite Your Tongue:
To avoid talking.
Blood Is Thicker Than Water:
The family bond is closer than anything else.
A rare event or occurance.
Break A Leg:
A superstitious way to say 'good luck' without saying 'good luck', but rather the opposite.
Buy A Lemon:
To purchase a vehicle that constantly gives problems or stops running after you drive it away.