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It is the facial expression of a person during sexual intercourse and especially during climax/ejaculation.
It can also be known as the face that a certain person puts on when around someone they are attracted to.
I better get my game face on, she is so hot right now....
by dails May 05, 2004
when you recieve the act of oral sex while playing a video game.
dude she gave be some gnarly game face last night bro.
by bouttta_get_hyphy September 30, 2010
the face that should be warn by a bus driver at all times, especially in times of alarm or warning
when the bus driver nearly crases and shits themselves, the game face must be applied to insure that the passangers are not alarmed
by chuck April 02, 2003