fib

Etymology 1

Probably from fable; compare fibble-fable (“nonsense”).

noun

1. (informal) A lie, especially one that is more or less inconsequential.
2. (informal, rare) A liar.
   "Oh! you dreadful fib," said Flora. 1861, Henry Kingsley, Ravenshoe

verb

1. (informal, intransitive) To lie, especially more or less inconsequentially.

Etymology 2

Shortened from fibula.

noun

1. (medicine, informal) The fibula.

Etymology 3

verb

1. (archaic, thieves' cant, boxing) To punch, especially a series of punches in rapid succession; to beat; to hit; to strike.
   Fib the cove's quarron in the rumpad for the lour in his bung; beat the fellow in the highway for the money in his purse. 1785, Francis Grose, A Classical Dictionary of the Vulgar Tongue, 2nd edition, published 1788, To Fib
   As Biggs and his party arrived, I heard Hawkins say to Berry, "For heaven’s sake, my boy, fib with your right, and mind his left hand!" 1852, William Makepeace Thackeray, “The Fight at Slaughter House”, in Men's Wives, page 16
   Then there was a wild scuffle and a furious outcry, and all the bargemen for a moment seemed to hug me and themselves too; when, as there was no room to hit out, in the phraseology of the ring, I fibbed at half-a-dozen waistcoats and faces with all my might and main. 1865, Grantley Berkeley, “Eton Boys”, in My Life and Recollections, volume 1, page 311

Etymology 4

Short for Fibonacci.

noun

1. (neologism) A kind of experimental poem where the number of syllables in each line is the next succeeding Fibonacci number.