" untruthful "

 [ "Untruth" ]

1: 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.

  * e.g.,  ... Person 1: The first person to talk to you today is a liar. 

 [ "untruthful flexible container of feces" ]

1: A polite way of saying the phrase, "lying sack of shit"; it can be used in typed text or spoken.

  * e.g.,  ... You claim that Linda stuffs Scottowels down the can?!? 

 [ "teller of untruths, your trousers have combusted" ]

1: 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"

  * e.g.,  ... Billy: Today I rode a Unicorn 

 [ "Untruther" ]

1: 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.

  * e.g.,  ... You are an untruther. It's hard to trust an untruther.