For best results, you should be a dirtball and not shave your pubic hair for months, but a couple weeks will also do. Take a girl back to your place and shave your pubes off in the bathroom (before having sex). Hold the pubes in your hand when you start to have sex with the girl. To pull this off you have to start to hit it from behind. When you are ready to climax, pull out and ejaculate in her ass crack. Finally, take the pubes, that are still in your hand, and throw them into the girls ass crack. Now you have a "Dirty Harry"

An exclamation made when your friends or family are teasing you to a point where you can't handle it anymore and a hissy fit is in order.

Derived from a YouTube user's famed outburst following Britney's lackluster performance at the 2007 VMA's.