1) When a man urinates with an erection inside of a woman's vagina.

2) When a man urinates inside of a woman with a condom on, pulls out, ties off the condom and slaps the shit out of his bitch with the piss-filled condom.

3) A wizard bar in Harry Potter. No piss involved.
Doug: Yo, why is your biznitch so pissed off at you?

Jordan: That's ironic. She's pissed because I gave her a leaky cauldron and my piss got all over her.

Doug: Isn't that in Harry Potter?

Jordan: You're such a fucking virgin. (explains alternate meaning of leaky cauldron)

Doug: *High Five*
by jtizzle94 December 2, 2009
Get the Leaky Cauldron mug.