simple past tense and past participle of fib

(medicine) Abbreviation of atrial fibrillation; also A-fib.

plural of fib

(informal) A lie, especially one that is more or less inconsequential. / (informal, rare) A liar.

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

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

(medicine, informal) The fibula.

(archaic, thieves' cant, boxing) To punch, especially a series of punches in rapid succession; to beat; to hit; to strike.

present participle of fib

(informal) The telling of a lie. / (archaic, boxing) Repeatedly striking an opponent's head while holding them in a headlock; a pummelling; a drubbing; a beating.