A weapon from Halo 3 that took Bungie thirteen years to add as a player wieldable weapon. It first appeared, in a slightly different form, as the P'fhor Shock Staff in Marathon where it was only usable by the enemy Fighters, it came in to versions Melee and Melee with an Energy bolt as it's secondary fire mode. The Gravity Hammer is considered by Bungie fans to be a bit of a let down even though sending people flying with it is fun.
Bungie Fan 1994: "Hey Bungie, when can my character use the Shock Staff?"
Bungie 1994: "Never! And shame on the modders who added it into their weapon lists! I'm looking at you Evil Team!"
Bungie Fan 2007: "Yay! I finally get to use the Shock Staff! What? Only the melee version? But I wanted the one that shot energy bolts..."
Bungie 2007: "What? No it's not! It's the Gravity Hammer! Who told you it was the Shock Staff? We have a security leak! CODE RED!"
by Security Officer May 14, 2008
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The Hammer on Halo 3, Halo 3: ODST, Halo: Reach, is one of the most brutal melee weapons in the Halo Saga. The Hammer has impressive destructive power and can also be used for other things then just killing, such as extra boost in the air or boosting your teamates into higher grounds. The Hammer is a reliable weapon for those who favors a Hammer that creates such shockwaves in their use of need or want. Normally people who uses a Hammer on any Halo games then any other weapon is usually the one who has poor skills with a weapon which deals with shooting bullets.

This powerful weapon has another name which is simply called Nuclear Nut Cracker when it comes to swinging the gravity hammer directly into someone's nuts/balls at maximum speed and strengh.

People who tends to look at the Hammer more as a nuclear nut cracker in which case instantly obliterates one's balls off the face of the universe which a single strike.
Gamer with gravity hammer: " Dude you just got fucked!!! HAHAHA damn your body looks like your doing yoga in the air!!!

Gamer who died: " Oh fuck you, you fucking noob bitch. bet you wouldn't try that shit if i was in your face"

Gamer with gravity hammer: " Hell yeah i would, watch me rip your face a new one!"
by Yashieyama December 11, 2011
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A weapon in halo three used by noobs to kill other noobs
noob 1: OMG a guy with a gravity hammer!!!!

by s98 October 12, 2007
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a weapon highly valuable in Halo 3.

another name for a penis.
Pick up that gravity hammer, it's uber.

My gravity hammer tore that bitch up.
by Peg Leg Pete October 16, 2007
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