Acronym for Official Old Farts Alliance.
Group of the best heavy metal and rock oldies on the planet. Regularly meet for gigs and festivals, the main one being the Download Festival held in Donington where they have their own 'Hill'.
Very approachable types when awak. Often seen with one or more alcoholic drinks in their hands, mumbling about the good old days of rock and how they can still hold their own in a pit though they 'choose' not to
Damn, look at that oxygen thief in the middle of the SlayerPit. He must be an OOFA.
An expression used when something is shocking. "shocking" can be when you see a hot girl or guy. Also can be used when someone is just acting completely stupid.
Pronounced: OOO Fah
Scenario #1: You are at College and see this hot girl (or even a hot teacher) walking through the court yard and you say out loud, but so she doesn't hear it, "Oofa!" An "Oofa!" would be at a higher pitch if she bent down to tie her shoes and cleavage was visible.
The scenario above may be switched for the female's perspective.
Scenario #2: You are at the movies in line for a cold soda and the idiot in front of you has decided to take up as much time as he likes to order food. You see he has a frequent movie watcher card in his hand, so you know he comes to the movies a lot. So why cant this guy make up his mind!!?? Your response: "OOFA!