When you're driving with your significant other, and she puts her ass over your lap and proceeds to shit all over your cock.
"Dad, I got road dump the other day."
by Dr. Allan Pole December 15, 2015
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When you're on the highway all day and you suddenly have to stop somewhere and shit
Patrick drove all the way from his house to work, came right in the door, and took a road dump
by CR_Chicks May 6, 2022
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