Answer (1 of 5) That's not as easy to answer as you may expect it should be Nobody knows who first said it or something very like it and there are many attributions for it that appear to be lies themselves This will be said, most especially by children, when someone is caught in a lie It's a FYI The origin and current status of the ongoing history of this expression {Limericks responses are welcome} Liar, Liar, Pants on Fire "'Liar, liar'—without the 'pants on fire'—has been around a long time," says Barry Popik, a linguist who specializes in slang and proverbs As early as the 1400s, people would call each otherWikipedia lists variants that have "Your belt's hanging on the telephone wire!", and (inspired by Pinocchio, one assumes) "Your nose is long as a telephone wire!" On the discussion forum for Martha Barnette and Grant Barrett's radio show "A Way with Words,"
The Doubtful History Of Liar Liar Pants On Fire Oddfeed
Liar liar pants on fire rhyme origin