The first piss you take after masturbating. This often results in a spray of piss coming out of your dick.
Guy 1: Dude! Why is there piss all over the wall?!

Guy 2: Hey man, I couldn't help it- it was a cum buster.

Guy 1: OK then.
by mrpopo123 October 3, 2010
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when 2 people engage in sexual intercourse in a Taco Bell parkinglot while eating a Crunchwrap supreme and uses the crunchwrap to ejaculate on or to clean up the mess.
Sal: "Hey wanna bang in my truck in the Taco Bell parking lot?"
Rachel: "Oh for sure, you know how much of a slam hog I am"
Sal: "I don't have a condom so let me hit raw and ill just blow a cum-buster supreme onto my crunchwrap, you can eat it after if you want..."
Racehl: "Hells yea! i love cum, and crunchwraps!"
by calaburrito December 16, 2009
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