Burn one`s bridges behind one

To do something that makes going back impossible. The man burned his bridges behind him and is unable to work in the same industry again.

Burn down

To burn completely (usually used for buildings). My neighbor`s house burned down last night.

Burn a hole in one`s pocket

To stimulate someone to spend money quickly. I got paid today and the money is burning a hole in my pocket.

Bundle up

To put on warm clothes, to dress warmly. We bundled up and went for a walk in the park.

Bundle of nerves

A very nervous or anxious person. The woman is a bundle of nerves after looking after her three children.

Bump (someone) up

To upgrade someone's flight or room or car rental etc. They bumped me up to first class for my flight.

Bump off (someone) or bump (someone) off

To kill someone. The criminal gang bumped off the leader of the other gang.

Bump into (someone)

To meet someone by chance. I bumped into my friend at the department store yesterday.

Bull in a china shop

Someone who is clumsy and upsets other people or plans. Our boss was like a bull in a china shop when I saw him at the meeting last week.

Build up to (something)

To lead up to something. Things were building up to be a very serious problem.