"Double Penetration" - Often occurs while playing Modern Warfare 2. This is when you walk into a room expecting it to be empty (either by UAV, Heartbeat Sensor or just by a guess) and instead you are shot to shit by 2 or more enemies at once. Can also be used to describe defeat by a large amount.
Dude, I walked in and was instantly double penetrated...don't go in there.
Yea they DP'd the shit outta me every round so now I'm gonna be a running pistol bitch.