A D.O.G. is someone with the potential to have really big dreams but without applying oneself will end up just eating the dirt, metaphorically speaking.
A D.O.G. usually starts out very timid or perhaps somewhat of a spaz in social situations. They show all traits of an extremely bright but also very underdeveloped individual.
D.O.G. in a classroom: Dude I think I'm gonna go to college and get my AA degree or something. But then I'll want to work a good job too, I mean I don't want to flip burgers or anything like that. Maybe then I'll meet a nice girl with cuteboobs and butt and go out with her and once I make enough money we'll be able to go on expensive dates and then we'll get married and have lots of babies. Hurray!
An abbreviation for "Glow in the Dark Venerial Disease," which is used to describe the glowing of a cell phone used around the crotch when someone is covertly texting during class or a movie.
The teacher was showing a crappy movie and saw Allen's G.D.V.D. and took his phone.