Give me a break!

"Give me a break" is something you say when you suspect that someone is pulling your leg or joking with you. It is also used when you don't believe what someone is telling you. 

Example:

Matt: "My father makes 100 dollars per hour working at the sausage factory."

Lizzy: "Give me a break. Sausage makers don't make that much money." 

Greg: "U2 is the best rock band in the world."

Sheila: "Give me a break. Just because they are the most popular doesn't mean they are the best."

Stuart: "If you don't do a good job on this report, the boss is going to fire you.

Max: "Give me a break. The boss would never fire me." 

Vocabulary

To pull someone's leg: To joke someone.  

To fire: To take away employment.