commonly used on HALO's multiplayer. stands for "plasma gernade, fragment gernade, rocket". commonly used on stunt servers where players attempt to do glitches (fall through map, fly though walls,get on top of map,etc.)on various HALO maps.
player2: how did you get on top of the map?
player1:pfr the warthog when you're in the top tunnel. if you do it right, you should end up on top of the map.