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.

A: "My father makes 100 dollars an hour working at the sausage factory"

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

A: "U2 is the best rock band in the world"

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

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

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