One who is not very bright. A tard; a retard.

Can also be someone that is very annoying.
Chiffon is an annoying tart because she talks too much about irrelevant topics that no one cares about.
by Darian C. November 13, 2006
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a word to replace 'retard'
chris: i just spelled sun, sone.

tyler: you're a fucking tart.
by shiloh orion March 31, 2006
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When a guy is sucking on tits, and then she farts from the stimulation.
I was sucking on my wife's tits, and suddenly, a tart slipped out.
by ANS13 September 20, 2015
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A word or phrase that nobody understands. When in public, saying the word "tart" (sometimes in uninterpretable languages) causes confusion and sometimes uneasiness. Can also be used as a noun, mainly in describing a person.
Boppa: "Dude I just got the sickest snowboard boots around!"

Aaron: "TARRRTTT!!"

OR

Waitress: "I'll be right back with your breakfast"

Aaron: "Hey Dave, don't you think she acted like a tart when she didn't bring me butter for my pancakes?"
by King of the Dancehall December 5, 2010
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A word used as an insult to someone acting stupid in an online game. to qualify as a "tart" they must not b acting quite as stuipd as a smacktard or a fucktard , but at the same time, not as "unaware" as a n00b . the person(s) must be acting a tart, not naturly one as this makes them a smacktard (if that makes ne sence)
oi, stop killin the hossies u tart
plant the fucking bomb u tart
ur a real tart 2day
by pieboy April 17, 2004
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