Beer or malt liquor which has a high alcohol volume is said to be "High Gravity" .

Examples are Steel Reserve and St. Ide's.
I'm running up to Rite-Aid to grab a 40 of High Gravity.
by 211 March 18, 2004
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A beer that has more alcohol in it, and is responsible for me making a urinal out of my dresser drawer.
"Dude, why is my dresser drawer all wet?! ....damn that high gravity!"
by PongChamp September 20, 2008
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High Gravity, when used to describe a beer, refers to the specific gravity of the wort, which is what beer is called before fermentation. When the wort's specific gravity, aka the Original Gravity, exceeds 1.070, the finished product is called a High Gravity Beer. The significance of High Gravity is that more sugars and flavoring agents such as caramel and dextrins are present in the wort, yielding a more alcoholic and flavorful beer.
Stout and Porter are examples of High Gravity Beer.
by Das Brau Meister October 28, 2013
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1) A phrase, originated by Kurt Vonnegut, that now refers to one's clumsiness in reference to dropping objects or tripping/falling down.

2)Having an erection at an inopportune time.
God: Man, I keep dropping stuff.
Shiva: Must be a high gravity day.

Lucy: Check out Tom trying to hide his high gravity day!
Sally: What a wanker.
by Holy Moses Roller Brigade March 13, 2008
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One of the more alcoholic beers/malt liquors out there, at a little over 10% ABV. Kind of hard to find and don't taste all that great, but will damn sure get you buzzed. Most beers are either a high gravity beverage, an ice beer, or a malt liquor, but Pitbull High Gravity Ice Malt Liquor just said 'Fuck it, all of the above."
Alcoholic 1: "Yo dude, I wanna get drunk really fast, do you have anything really alcoholic, like some Colt 45 or possibly a King Cobra?"

Alcoholic 2: "Man, fuck that pussy shit, go get yourself a Pitbull High Gravity Ice Malt Liquor outta the fridge. Its got like 20 percent more alcohol than that stuff."
by EyeDestroyHores November 1, 2009
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