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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".
by petert71 May 12, 2011
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