gdiad
web lingo, shortened form of "go die in a ditch", used when your angry at person for doing something that is stupid, jerk like, ass-holeish or for being any or all of the above 
guy1; i just wrecked your car man! it was awesome
guy2: what! why? You imbecile, gdiad 
guy1:what?
guy2; go die in a ditch you jerk