urinectomy

To make fun of a friend or, per its literal equivalent, to take the piss out of someone.

"What did you say about my mum?"
"Relax, mate, it's just a urinectomy."

by Ben Frey May 10, 2006

grinectomy

Removing long lasting grin from someone's face

Pulling jokes can be bad for your health!

by Miki Rsumovic September 3, 2005