FIB, n.
A lie that has not cut its teeth. An habitual liar's nearest approach to truth: the perigee of his eccentric orbit.
When David said: "All men are liars," Dave, Himself a liar, fibbed like any thief. Perhaps he thought to weaken disbelief By proof that even himself was not a slave To Truth; though I suspect the aged knave Had been of all her servitors the chief Had he but known a fig's reluctant leaf Is more than e'er she wore on land or wave. No, David served not Naked Truth when he Struck that sledge-hammer blow at all his race; Nor did he hit the nail upon the head: For reason shows that it could never be, And the facts contradict him to his face. Men are not liars all, for some are dead.
Bartle Quinker
--Ambrose Bierce - The Devil's Dictionary