look up any word, like the eiffel tower:
 
1.
while your girlfriends asleep you put your fully erect penis inside her vagina all the way then pull out and run away,
dude while Jan was asleep lastnight i stuck my penis inside her really fast then ran away. i gave her a stun grenade.
by destroy850 October 09, 2008
 
2.
The act of cupping one or both of your hands, and slapping a friend in the ear(s) so they temporarily cannot hear.
I gave John a stun grenade, and he could not hear for the next five minutes.
by Kvonbrown22 September 28, 2011