A phrase that is another way of saying awesome, rad, cool, sweet, tight, etc. You do not use it in the middle of a sentence.

example of how NOT to use it: I have a that go hard mp3 player.
How to use it:

speaker 1. "Man, Yesterday i got this sweet bass system for my car."

speaker 2."Oh that go hard."
by kip April 16, 2005
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in cleveland
doing something to it's fullest; doing something well;
"I go hard in da paint", "Them hoes cant fight, dont none of them go hard", "Go hard or Go Home"
by Dai G.A.B March 23, 2007
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to kick it to the fullest. gettin' drunk, high etc. partying like there's no tomorrow.
Andre: Ayo, is you goin to the party tonight?
Sean: You already know. I'm going hard, yo.
Andre: Yeah i feel you - i'm goin hard too. Kickin it like there's no tomorrow.
by anjee minaj December 30, 2009
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Doing something with 100% effort, but requires some unteachable skill.
Something a beast of a man does all day everyday.
He doesn't give a damn about the consequences, does life like a Jeff Zhao up life's Punhani.
Suraj: "I go hard at everything"
by PedroTheConqueror October 16, 2011
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when someone reaches their full potential, at doing whatever they're doing
I'm trying get body ripped by the summer, that means I have to go hard in the gym these next few months
by gamefein December 29, 2011
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When someone or someones acts in a nature that is usually bold, brave, threatning or humilating to another person. In different situations it may be doing something a majority of peers would disagree.
1.Whassup nigga I heard your cuzin smack nigga in front that nigga ghetto bitch, yo go hard.

2.That nigga Tevin wore all pink to the club, he go hard.
by Brian Eggleston January 7, 2008
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Something that is tightor quite remarkable.
Can be you with music,looks, and etc.(Texas)
That song my 8 balL & MJG go hard.
That shirt go hard with them shoes.
by DE-BO July 5, 2004
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