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.

When you have to go poop, usually when you also have a mobile device.

A game-time is when a bartender goes out and buys four roofies, and spikes the drinks of four customers (preferably male). If done correctly, they should pass out at almost the same time, in a similar fashion to a Mexican wave, ready for duty.

Made famous by BaratsAndBereta (youtube.com/watch?v=CBCEnVBaPOs#t=88)