Idioms B

back and forth = to go between two places, again and again.
He bikes back and forth between his job and his apartment every day.

back up = to support, to help someone
Robert plans to back up his wife when she delivers her baby. (used as an infinitive)
also...
If he is unable to drive her to the hospital, they have a back up plan. His brother can drive her there. (used as an adjective)

bend over backwards = to work hard at something; to try to help someone.
The government bent over backwards to get the I-35W bridge rebuilt.

better off = in a situation that is good--better than before.
Jen thinks she's much better off with her new boyfriend. Her old boyfriend wasn't very nice to her.

break down = a machine stops working, usually used for cars
Tim's car breaks down all the time. He has to get a new one.
This is the third time it has broken down this week. (present perfect)


break up = 1. to make something small; 2. to end a relationship.
She got a phone call from her boyfriend. He told her he wanted to break up with her. (definition #2)

bump into = meet someone you know by chance or by accident.
On the way home from the store, Alice bumped into an old friend she hadn't seen in years.

by the way = This idiom is used when you want to introduce something new in a conversation.
It's usually off topic.
"Juggling is easy for me. I've been juggling for years. By the way, I also know how to do backwards somersaults."