When you are in a car with three or more people, and at least 2 are having sex.
I was thankful for the ride, but Chris was getting some serious carpoon while bringing me home.
by Truck guy January 9, 2015
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A portmanteau of "Cartoon" and "Poon" (or poontang)

Used to refer to the genitalia of a female cartoon character
Man, I'd love some of her carpoon
by Afro-duck February 16, 2007
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