Fib \Fib\, n. [Prob. fr. fable; cf. Prov. E. fibble-fabble nonsense.]

A falsehood; a lie; -- used euphemistically.

They are very serious; they don't tell fibs. --H. James.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Fib \Fib\, v. i. [imp. & p. p. Fibbed; p. pr. & vb. n. Fibbing.]

To speak falsely. [Colloq.]

Source: Webster's Revised Unabridged Dictionary (1913)
 

Fib \Fib\, v. t. To tell a fib to. [R.]

--De Quincey.

Source: Webster's Revised Unabridged Dictionary (1913)