We use this phrase when we think somebody has told us a lie to make a joke.
You can use this phrase in ………… language.
A: Did you know we have a sea in the Czech Republic?
B: Oh, pull the other one!
A: Yes, you’re right. I was just kidding.
A: Guess what! I’ve just bought a Lamborghini.
B: Oh, go on pull the other one. You’re having me on.
A: No seriously. I have inherited a lot of money from my uncle.