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!