The act of hitting the front brake handle too forcefully on a bicycle, causing the torso to slide forward and the scrotum to painfully smack the handlebar brace. After the pain subsides, the swelling and purple testicles become a reminder of this careless mistake.
Hahaha -- did you see Stanley just pull a purple gurp? Swear to god, he flew over the handlebars after smashing his sack!
by Droogie Toogie August 21, 2012
Get the purple gurpmug.