Someone, who when out with friends at a social gathering could ‘go off’ at anytime and cause complete and utter chaos to what was a well conducted evening
Wy did you invite Garner out man? you know he’s a social hand grenade, and I’m meeting that smart bird from work later on, I can’t belive it
Reference to when a freshman female's arse seems to inexplicitly increases in size during her freshman year at college. She's described as, "having had a visit from the handgrenade man".
The handgrenade man shoves a handgrenade up her arse, where it explodes permanently engorging her backside.
"She had such a nice arse, until she had a visit from the handgrenade man".
When someone throws a handgrenade With high hopes for it to go somewhere but instead the grenade Returns to the one who threw it, either because the grenade hit something on the way or landed on something wich changed it's direction drasticly.
Might also be used if the enemy throws the SAME grenade back.
"See this gory mess on the wall ? That's what remains of the guy who threw a ironic handgrenade"