1 definition by Forest Kin

Top Definition
When the vibrations of a car, train or plane journey cause you to get a hard on. also for further amusement - sometimes sexual, one can tightlypres the area around giving it a firm clear outline of the boner, this is then called a "Car Boner Hand Print" derived from carbon footprint.
"Dude, put that Car boner away, you're making me ill!" "Woh vibrations are getting to the lower quater, think i got a car boner coming on" "Brookes Mathews made a major car boner hand print the other day, soo clear but soo small" "Brighton + Lifton = a journey full of car boners"
by Forest Kin January 23, 2008
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