Idiom of the day :- Pull Someone’s Leg

Usage, examples and definition of the Idiom :-

Hey, Al. I was invited to be a judge for the Miss America Beauty Pageant! Oh, really? Come on, you’re pulling my leg! No, honestly. Do you really think that I’m trying to fool you with a ridiculous story? Well, you’ve told me foolish stories before. I can assure you that this one is for real.