Top Definition
Military term for Opposing Force during a combat simulations and war game scenarios.
EX: The opfor is approximately 300 meters from your position. Take care.
by The Omega Necro November 16, 2007
A term used by players of call of duty 4 to describe members of Al-Qaeda and other terrorist organisations and members often wearing head wear to cover their faces and carrying ak-47 assault rifles and RPGs or any person resembling an arab member of the gameplay.
Lets hope our boys are kicking the shit out of those OpFor bastards.
by AUSsieDropKick June 11, 2008
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