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!
Soldier 2: No don't worry, it's a fail grenade. It won't explode.
Everyone: FAIL!
by TheFailGrenade November 3, 2009
Get the Fail Grenade mug.