Top definition
A grenade that upon triggering it releases large amounts of foam. It was introduced in the movie "Doomsday" (2008), which enables the user to softly land a falling elevator shaft.
"Oh snap, the elevator is going to fall and kill us all, did you bring the foam grenade?!
by Jesusonline January 03, 2010
Get the mug
Get a Foam Grenade mug for your Facebook friend Paul.