Top Definition
Liar Liar Pants On Fire is a phrase that children like to scream at each other whenever they think the other is lying. They also like to scream it at adults who tell them stories about fairies. It is an overall stupid thing to say, since if your pants actually caught on fire when you lied, more politicians would be dead.
Kid: Liar Liar Pants On Fire!
Adult: Shut the fuck up.
Kid: *cries*
by Adam Cecil May 29, 2006

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"Liar Liar Pants On Fire" is a playground taunt that is used to indicate each other whenever they think the other is lying.

It refers to the fact "fibbing" is consider naughty, and pants/bottom 'on fire' is an euphemism for spanking.
Child1: Well my dad can pick up a truck!
Child1: Liar Liar Pants On Fire!
by Roguebfl April 14, 2009

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In my experience when I was growing up," Liar Liar Pants On Fire" refereed to the ass whipping you would get if your parents caught you lying.You felt like your pants were on fire afterwards
Mom yelled"Liar Liar pants on Fire" when I was caught lying about skipping school.
by Geek Hillbilly June 06, 2016

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" teller of untruths, your trousers have combusted." <- greatest translation error ever!!!!
teller of untruths, your trousers have combusted.

(Example should include the word "liar liar pants on fire")
by *angry face* November 04, 2010

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