Definitions by Boner patrol and friends

XURL 

A random, raging, and uncomfortable boner that you get in class that doesn't go away for the entire class

Guy 1: "Dude, Algebra class sucked"
Guy 2: " Not really, we did nothing the entire time"
Guy 1: "But I had the worst XURL the enire time"

XURL by Boner patrol and friends March 19, 2015