You're pulling my leg!

Meaning

Expressing disbelief or suspicion that someone is joking.

Examples

• John: I won the lottery!
• Alice: <b>You're pulling my leg</b>! You're always joking.
• John: No, seriously! I have the ticket to prove it!
• Alice: Wow, I'm amazed! I still think <b>you're pulling my leg</b>, but congratulations if it's true!