adj. - Acronym for "own fucking program".
1) Military slang for when a person is doing their own thing, "singing to their own tune", and generally just acting different or seeming to be in their own world.
2) Also military slang for when an object is not working properly.
1) "Why on Earth did Brown did a tattoo of Daffy Duck? He's OFP, dawg."
2) "My laptop is OFP. It keeps giving me error messages when I try to shut it down."
Operation Flashpoint (also Arma: Cold War Assault) is a series of military simulation games. The first game, Operation Flashpoint: Cold War Crisis and its expansion Operation Flashpoint: Resistance, was developed by Bohemia Interactive Studio. The second games, comprising Operation Flashpoint: Dragon Rising and Operation Flashpoint: Red River, were developed by Codemasters. There are also three spiritual sequels to the original game made by Bohemia Interactive Studio; ArmA: Armed Assault, ARMA 2 and ARMA 3.
"Hey, have you played that game called OFP? It's cool! You should check it out some time" - someone in 2001