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1.
The act of opening up your hand while your fist is inside of either an asshole or a vagina.
man i totally frag grenaded that chick's ass last night
by storkut January 18, 2009
21 12
 
2.
A marker most commonly used to indicate where you should not be standing
rather dashing Englishman: Oh My! there appears to be a frag grenade at my feet!

Quite a proper sort of chap: Well it is rather a good job someone put that there or you wouldn't have known where you should not be standing is it not
9 4
 
3.
The cool way to say "no homo."
Rule number one, no frag grenades.
by mlwsoccer August 24, 2008
3 5