AvP refers to anything that the speaker already knows and is old news.
AvP is the abbreviation for "Aliens vs. Predator" and refers to the old AvP VIDEO GAME (not the movies) from 1999 which, by this point, is pretty much old news.
Dude: "Hey man, did you hear that they're filming that new Clash of the Titans movie?"
You: "Yeah, dude, that sh!t's totally AvP."