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(n.) masturbating and achieving orgasm during driving.
I carmaxxed about halfway through my drive to philadelphia the other day
by keillor December 13, 2010
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Not a definition to look up at work, especially if you work there... it could lead to trouble.
Hey don't look up CarMax at work, Joe did and is gone now!
by JonnyMoondog August 31, 2016
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