Top Definition
What you get when you travel by car for long distances.
You for sure will have "car butt" after driving from NY to LA on vacation!
#travel #car #butt #automobile #vacation #leisure
by phyllisw July 20, 2009
When a passenger falls asleep as soon as the vehicle begins motion.
"The baby has car butt. Take him on a drive to put him asleep."
#sleep #tired #exhausted #drowsy #passed out
by Keybo4rd_Warri0r June 27, 2013
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