When you are masturbating and are borderline the climax point, and then you run into your friends, girlfriend, or complete strangers room, bedroom, or where they are hanging out. You then proceed to bust an enormous "man juice" load onto them, preferably precisely hitting the bulls eye face cum shot. Best results are obtained by finding someone asleep allowing for the possibility of performing the horrendous but satisfying act, in a surprise attack. The next best choice for anyone willing to do this, is to run like hell, completing the "Drive By Glazing".
Bro: Yo man, I totally snuck up on your girl and busted a huge semen load in her face.
Dude: Im gonna beat your ass, you totally violated her with a drive by glazing.