As one of the world's lesser known, yet great acronyms, this is a
one-word abbreviation for the more lengthy instruction, 'Fuck Off Bastard, You're A Cunt'. However, acronyms have been entered into the Oxford-English
dictionary dating back as far as William Shakespeare and therefore. it is accepted that as one word, FOBYAC may still be accepted.
See links to fuck, bastard and cunt.
When establishing that one is in the presence of a person who is somewhat, (grossly), disliked, they may be invited to "FOBYAC". In this manner, the word may be used in the clear satisfaction of knowing that as few will understand it's true meaning, no street fight wil ensue.
Indeed, walking up to an officer of the law, a copper, police officer, or even an immigration official, (see wanker),
one can use the word and be faced merely with a confused look. In this respect, as opposed to
better known and wider understood and employed expletives, complete safety for
one'
s person will ensue.