A clutch moment that seals victory for said person.
While playing madden 07' player has 80 yard run with 20 seconds left in the 4th qtr.

"thats gametime my nig."
by phildafunk June 8, 2007
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When something is extremely clutch, or last minute, and adds a positive element.
Jesus Lebron James just threw up such a gametime three.

by MikeAE April 28, 2007
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3:03, a.m. or p.m. It does not matter where the person is, when they know it is 3:03 they must shout Gametime!
"Dude, it's 3:03" in unison: "GAMETIME!"
by kuroiforest March 20, 2010
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GameTime is the act of leaving shit stains underneath a partner's eyes, like athletic eyeblack, by taking your cock out of her ass and slapping it against her eyes without wiping it off first. The result is that as the dick is slapped across the receiver's face underneath each eye, shit is scraped off and comes to rest beneath each eye looking like eye black, which blocks the sun for football athletes. Eye black is a grease applied under the eyes to reduce glare. It is often used by baseball and American football players, where sunlight or stadium lights can impair vision of an airborne ball. Eyeblack has been used for centuries to help reduce the glare of the sun.
Last night, I fucking GameTimed that bitch. I told her it was Game Time!
by You know which James February 6, 2009
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a shower taken when you are about to be part of an important event such as a party, or when you are going to tackle a challenge. the shower is not done till you leave the bathroom

for the duration of the shower you may use your best soap, wash cloth, toothpaste, etc.

if you do not come out of the shower with your game face on, you did it wrong

possibly the best shower known to man
(don't forget to gaze into the mirror)
Jeff was late for his own party because he was in the gametime shower.
by handsomevirgil February 27, 2010
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