you're pulling my leg

you're pulling my leg

You're lying to me. Often refers to some kind of playful deceit, not a malicious lie. A: "I swear that guy is a famous body-builder." B: "You're pulling my leg—I'm bigger than that guy!"
See also: leg, pull
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3 Combined INSURANCE: Group 10 PRICE: pounds 16,675 on the road WHAT'S HOT: Magnificent engine, top notch build quality, six-speed gearbox WHAT'S NOT: Tight for three in the back, smallish boot MAIN RIVALS: Ford Focus TDCi, Fiat Stilo JTD, Peugeot 307 HDi DturboSHESAYSC'mon, you're pulling my leg, this isn't a diesel, it's far too quick to be a derv burner.
My wife told me and I thought you're pulling my leg.