backer

supporter, often financial support

Example:

Their main backer is Pirelli.

bad-mouth

to talk badly about someone or something

Example:

She is always bad-mouthing her colleagues.

ball in someone's court

to be someone else's turn

Example:

The ball's in their court now. They will either buy or sell the company.

ball park figure

an estimate

Example:

We know that an exact figure is difficult, but could you give us a ball park figure so we can talk to the directors.

baloney

nonsense

Example:

You're talking baloney again, Jim. Think before you speak.

banana-head

a person who is stupid

Example:

We can't do that, you banana-head. It would make to cost too high.

banana republic

an often small country with a very unstable goverment

Example:

This company is like a banana republic. Policy changes from one second to another.

bang

some excitement

Example:

They got a bang out of your new ideas.

bang for the buck

value for money

Example:

There products are very good, you get a lot of bang for the buck.

banker's hours

short working hours

Example:

After they cut his pay he started working banker's hours. He has no interest in his work anymore.