Idiomatic expressions with definitions and examples

Below you will find the idiomatic expressions with definitions and example sentences. Please feel free to leave comments and rate how often you hear the idioms.

Bad mouth

Example Sentence: 

He such a bad mouth that no one wants to be around him.

Explanation: 
A bad mouth is a person that constantly says negative things about other people or things.
Your rating: None (79 votes)

Bad shape

Example Sentence: 

The used car was in really bad shape and needed a lot of work.

Explanation: 
When something is in bad shape it means that it is in poor condition. When it refers to a person it means the person is not healthy or not well.
Your rating: None (28 votes)

Bag of bones

Example Sentence: 

She was such a bag of bones her parents began to worry and took here to see a doctor.

Explanation: 
A bag of bones refers to a person that is very underweight. So much so that you can actually start to see the outlines of their bones.
Your rating: None (76 votes)

Bag of nerves

Example Sentence: 

When she heard that her husband was in a car accident she was a bag of nerves until she was finally able to get to the hospital and see that her husband was not injured.

Explanation: 
A person that is a bag of nerves is someone that is extremely nervous or worried about something.
Your rating: None (57 votes)

Bait and switch

Example Sentence: 

I went to the car dealership to see the car that was in the advertisement but when I got there I realized that it was just a bait and switch. The advertised car was not there and they tried to sell me a more expensive vehicle.

Explanation: 
Often companies will advertise an item at a very low costs to attract customers. However, when the customers go to buy they product they find out the product is not in stock or is different then they expected. Then the company tries to sell the customer a more expensive item.
Your rating: None (38 votes)

Bakers dozen

Example Sentence: 

Everytime I ask for 12 donuts the girl behind the counter always gives me a bakers dozen.

Explanation: 
A bakers dozen is 13 instead of the usual 12.
Your rating: None (35 votes)

Balancing act

Example Sentence: 

Mary had to perform a balancing act between work, college and taking care of her kids.

Explanation: 
When someone has to do many things at the same time it can be referred to as a balancing act.
Your rating: None (29 votes)

Ball and chain

Example Sentence: 

Jack wanted to go play poker with his buddies but the ball and chain would not let him.

Explanation: 
Ball and chain often refers to a persons wife. The expression comes from when prisoners had a ball and chain tied to their ankles so they could not easily escape. It can also refer to something that keeps a person from doing the things he or she really wants to do.
Your rating: None (36 votes)

Ballpark figure

Example Sentence: 

He could not give me an exact estimate of the cost but he did give me a ballpark figure and it was much more than I was expecting.

Explanation: 
A ballpark figure is a rough estimate of something. For example, if you call painter to see how much it would cost to paint your home, the painter may not want to give you an exact price until he has seen your house. In that case he may tell you a price but specify that it is a ballpark figure. That is to let you know that the actually price may be different.
Your rating: None (35 votes)

Bar fly

Example Sentence: 

That girl was known around town as a bar fly, she would go out almost every night.

Explanation: 
A bar fly is a person that goes to bars (pubs) on a regular basis.
Your rating: None (53 votes)