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A pretty failed grenade that doesn't explode. Whoever throws a fail grenade is a n00b and is instantly pwned.
Soldier 1: Grenade!!!

Soldier 2: No don't worry, it's a fail grenade. It won't explode.

Everyone: FAIL!
by TheFailGrenade November 02, 2009

Words related to Fail Grenade

fail grenade lol n00b pwned