The Royal Air Force, second to none. Generally considered as second to the USAF due to having less planes, but as they say: it's not how big it is, it's how you use it!
Of course, being able to determine the difference between allies and enemies is always an asset that the RAF have had, whereas certain other Air Forces consider anything on the ground to be fair game.
"Bally Jerry, pranged his kite right in the how's-your-father. Hairy blighter, dicky-birded, feathered back on his Sammy, took a waspy, flipped over on his Betty Harper's and caught his can in the Bertie!"
"I'm afraid I don't quite follow you, Squadron Leader!"
(The RAF don't actually talk like that... all the time)
Initialism for Rude As Fuck.
Jenny just said it looks like I've put on a couple of pounds...RAF!
The RAF (Royal Air Force) is Britains air force. Bombed the shit out of Nazi Berlin in WW2.
Hans: Oh shit the RAF are comin'!
Jurgen: Oh well. It's 'pull your trousers down' time boys. We're about to get royally raped.
The Royal Air Force. Airforce of the United Kingdom. Best in the world. Let down often by poor British Government and lack of funding. Not as gung-ho as many other larger countries airforces. Get the job done in the best way possible with minimum fuss and jingoism.
"It's great to see your RAF planes flying overhead, gives us a real feeling of safety" - quote from US Serviceman, Afghanistan 2004.
A British play on abbreviation: The Royal Air Force (The air force in Britain). When shouted in a bar means "Rough As Fuck" as in:
(1) Oh my God - look at the state of those women - R.A.F.
(2) Watch out boys - the R.A.F. are here...
Britian's Royal Air Force
The RAF fought well in WWII
stands for "rowdy as fuck", usually partywise
person 1: "hey what are you doin tonight?"
person 2: "gettin R.A.F.!"
Ratchet As Fuck
That girl masturbating on my Facebook newsfeed is RAF