1 definition by muffinhasmypants

Reverse Hand Grenade

Slide your fist into someone's asshole and spread all your fingers out all at once.

Much like the regular hand grenade, but instead of using a vagina, you are using an ass hole.

"Did you hand grenade that chick last night?"
"No, but I did do a reverse hand grenade!"

by muffinhasmypants April 19, 2009