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1.
The token ugly friend of the hott girl at a bar who also happens to be morbidly obese (Also see grenade). Not only is the girl horrifically ugly but is also unfortunatly whale like and may even charge at random pretty girls like a Hippo. As popularized by the the MTV hit series Jersey Shore.
Dude I cant get with this hott girl because of that repulsivce grenade launcher in the way.
by milty08204 January 07, 2010
 
2.
The fatter and uglier friend of a grenade. Often brought along to make the grenade feel that she is not the ugliest girl at a party. The main purposes of the grenade launcher is to cockblock, instill fear, provide backup in a fight and to purposely rile up the grenade into exploding the chances of sex for everybody. Popularized by Mike "The Situation" from the MTV hit series Jersey Shore.
Its bad enough that this cutie brought a grenade with her, but this chick also brought a god damn grenade launcher as well. I personally try to avoid grenade launchers, at all cost. Not worth getting my GTL on for. At all.
by jinful February 26, 2010
 
3.
A woman who births ugly daughters.
Popularized by Mike "The Situation" from the MTV hit series Jersey Shore.
Donald says to Matt.."Damn that Michelle is ugly!!"
Matt says..."So is all of Michelle's sisters. Michelle's mother is obviously a grenade launcher"
by C-DOGG72 August 28, 2010
 
4.
A Bro's girlfriend who pushes her ugly friends on the Bro's Bro.
Bro: Yo you wanna hangout with my girl and her friend tonight?
Other Bro: I don't know Bro is your girl a grenade launcher?
by Borickly November 03, 2011
 
5.
1)Any extremely attractive girl who surrounds herself by fat, unattractive bitches who usually have way more self confidence than their massive, cellulite filled bodies allow for (see Swamp Donkey)

2)A bottom tier sorority that is constantly launching grenades into your fraternity parties drinking all your alcohol.
1)Damn Kelly is so fucking hot but she is such a grenade launcher, all of her friends are at least 250 pounds and the face of a ferret.

2)Fucking Sigma Kappa, always grenade launching their freshman into our parties!
by JerryFratDusky April 29, 2012
 
6.
When you and a friend try to hook up with some chicks but one of them is really ugly, he'll be the grenade launcher and take the "grenade" so you can have a good time.
Me: dude, check out those girls
Friend: ewww, look at her friend. Looks like her face was hit by a bus...
Me: yea but the other one is fine. Be my grenade launcher.
by Yoxcf August 01, 2011
 
7.
a piece of weaponery used in the process of launching grenades.
Daddy, may i PLEASE have a grenade launcher for Christmas??
by FuckAnarchy907 June 28, 2006