The edited version of the word "fucking." Spelled this way, it is incorrect. The letter "F" is not to be spelled out. See F'n or F'in for correct spelling.
A new photo craze like planking or horsemanning, where two people form a capital F with their bodies. Person 1 sits on top of Person 2's shoulders with their legs and arms straight out in front of them.
A variation on the term "Effing and Blinding", meaning to swear or curse profusely. Used in the North of England, notably by one Karl Pilkington in an episode of the Ricky Gervais Show.
Karl: I've just slagged off thatoctopus, but at no point was I effing and jeffing about it.
When you realize that something is so amazing and has so much potential, but you decide not to use a real swear word as an adjective and are polite about screaming it out.
Did you hear the effing amazing news? Justin Bieber said that he likes Joel so there's a chance that their relationship could progress.