fib

I do not know if, as you say, they ride on broomsticks; but I'll tell you this: My father was no fibber.

You are a classical scholar when you use hyperbole and a 'fibber' when you exaggerate.

"It's here, you fibber," his daughter cried merrily, persisting in her search.

Fib′ber, one who fibs; Fib′bery (rare), the habit of fibbing; Fib′ster, a fibber.