The act of laying flat on the ground with a weapon in an online game. It usually involves a player laying on the ground with a weapon that doesn't require skill or with a weapon that isn't made to be proned with.

when you're hungover as shit after a spending a night drunk as a skunk

Similar to "pwn'd", "proning" is the act of going prone on a defeated enemy (similar to the act of teabagging). It originates from games such as Call of Duty.

Uber skill involved in Battlefield 1942 whereby one hits the deck with remakable force without sustaining damage. Used to dive out of the way, avoid fire etc.