pull the other (one|leg) (, it has got bells on|)
1
to show that one believes that someone is joking or lying
The idiom "pull the other one" is a humorous and somewhat sarcastic expression used to express doubt or skepticism regarding something someone has said. The origin of this phrase is not precisely documented, but it is recognized as a playful and somewhat tongue-in-cheek way of challenging the credibility of a statement.
- Is he going to study integrals?Pull the other one, it's got bells on—he can't even do basic multiplication.
- Yeah, OK, pull the other leg, it's got bells on!
- You, the descendant of a king?Pull the other leg mate!
- Your boat was sunk by a swordfish?Pull the other one!
- You won the lottery?!Oh, come on, pull the other leg, it has got bells on!