Meaning:
=to tease someone
= to play a trick on someone

When you pull a person’s leg you are making fun of him, usually in a good-humored way

Conversation 1
Aussie: Did you know that those cockatoos attack humans?
Tourist: Really? (Scared)
Aussie: Nah! Just pulling your leg! (^^)

Conversation 2
Girl A: He was just checking you out.
Girl B: Really!? (excited)
Girl A: Just pulling your leg.

Example
Don’t pull my leg!
Stop pulling my leg!
He’s just pulling your leg.
Are you pulling my leg?= Are you serious? That’s crazy!

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