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 : WordNet®

fib
     v : tell a relatively insignificant lie; "Fibbing is not
         acceptable, even if you don't call it lying"
     [also: {fibbing}, {fibbed}]

fibbing
     n : a trivial act of lying or being deliberately unclear [syn: {paltering}]

fib
     n : a trivial lie; "he told a fib about eating his spinach";
         "how can I stop my child from telling stories?" [syn: {story},
          {tale}, {tarradiddle}, {taradiddle}]
     [also: {fibbing}, {fibbed}]

fibbing
     See {fib}