Why are liars that lie so much called "big fat liars"?

Question

Is there any story behind it?

Answer 1

You already asked the same question LOL

http://answers.yahoo.com/question/index?...

Answer 2

I think it refers to the size of the lie, not the size of the liar.  A "big fat liar" is the superlative of "the little white lie"

Answer 3

Well, the term was derided from the 1800's when there was this guy who who lied absolutely all the time and I think he some kind of birth defect because every time he lied, he got fatter and fatter and it just kept going throughout generations.