Something that cannot be defined as true, yet is not necessarily false; often has a sense of truthiness to it when used in the context of a paradox.
Person 1: The first person to talk to you today is a liar.
Person 2: That would be you...
Person 1: Exactly.
Person 1: So is that true or false?
Person 2: That's an untruth, because you're projecting properties that can't exist; it's neither true nor false and you're an idiot.
Person 1: Untruth isn't a word.
Person 2: Spellcheck disagrees.
by Zaneshift June 23, 2010
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A polite way of saying the phrase, "lying sack of shit"; it can be used in typed text or spoken.
You claim that Linda stuffs Scottowels down the can?!?
Why Josh, you untruthful flexible container of feces!!!
by Telephony May 4, 2013
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Is a phrase that has become popular after somebody posted on MLIA (mylifeisaverage.com) about translating the phrase "Liar, Liar, Pants on Fire!" to French and back again, and coming up with "Teller of untruths, your trousers have combusted"
by Somebody_Else October 26, 2009
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someone or something that actively lies or says false statements (often used euphemistically).

To make a statement of action then renege with updated or added stipulations.
You are an untruther.

It's hard to trust an untruther.
by PS118 September 7, 2022
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