Top Definition
In a car, a seat heater that roasts your ass to the point where you think your cheeks are going to melt together.
friend - "Holy crap, dude, my new car has seat warmers, and they're total butt-welders!"
Por joelh 02 de enero de 2008
5 Words related to butt-welder
Rectal intercourse.
I was visited by a butt welder in the showers last evening.
Por junior 08 de septiembre de 2003

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