Short for Delete Fucking Everything, the act of deleting everything on a web page or hard drive in an attempt to avoid persecution, prosecution, and insult.
Billy: Oh shit, they're flaming my youtube page nonstop! Time to DFE!
Short for dance floor erection. The unfortunate result that occurs when a guy grinds with a girl on the dance floor. DFE is often hard to hide and is a taboo subject between the guy and the girl.
Guy 1: Dude, did you see Trevor at Winter Ball last night? What a bro!
Guy 2: Yeah man. I bet he had some major DFE, though.