What is Gmac?
1.
Named after the short but tenacious Syracuse point guard Gerry McNamara, a GMac is any inprobable clutch or momentous action a person pulls off, usually at the last second.
I can't believe Tom pulled that test grade out of his ass -- that was a total GMac.
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Where a man goes to put a condom thats too small on and it makes the penis look like an hourglass.
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The act of explosive diaharrea backsplashing off the toilet onto the area of skin between your ballsac and your asshole.
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