To make a u-turn while driving. Sometimes, but not always, used to illustrate that said u-turn is risky or illegal.
Husband: "O.K., make a right here."
Wife: "You fuckwad, why do you always tell me when I'm right on top of the turn!"
Husband: "Well you know where it is bla bla bla"
Wife: "Oh shut up, now I have to bust a U right here on Euclid Avenue."
Wife: "You fuckwad, why do you always tell me when I'm right on top of the turn!"
Husband: "Well you know where it is bla bla bla"
Wife: "Oh shut up, now I have to bust a U right here on Euclid Avenue."
by mellowcheddar August 22, 2007

When in the act of getting a blowjob, you pull your penis out right before shooting your load and stuff it into your partner's nose. Your load goes up one side of her nose and back down the other.
Dude! I was totally Busting a "U" on this chick I took home from the bar last night. This morning she woke up whining and complaining about a stuffy nose! Can you believe that? What a bitch!
by dirtybuccaneer August 09, 2009

by Hikari-san June 15, 2007

by 6th hour geometry May 03, 2018

