The act of using your vehicle as support (and/or to block your bare ass from view) when you can't make it to a "real" restroom and instead have to use the side of the road as a toilet. Can be the result of either an emergency or laziness and is preferably done in a secluded place.
Earlene drank her Boone's wine so fast on the way to the party that we had to stop and let her bumper-pee at least three times before we even got there.

I can't hold it to the next rest stop -- you're gonna have to stop and let me bumper-pee or I'm gonna wet my pants in your car!!!
by kellyj2777 August 11, 2006

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×