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1.
or text-tard, or texting retard, someone who has trouble sending text messages from a cell phone key pad (makes many mistakes, takes a long time to send a message or a reply) or someone who sends a text message (usually personal and not to be disclosed) to the wrong person.
Joe is such a textard, every time i text him, he takes forever to send a reply.

Jill had a textard moment when she sent a picture of her bare ass to her dad instead of her boyfriend.
by shizzlehead January 03, 2007
 
2.
n. The combination of the words 'text' and 'retard'. Used to describe someone that will constantly use text-speak nearly to the point of you wanting to slap them several times for looking so unintelligent and all-around annoying. However, using frequent text language, with the acception of cell phones and actual text usage, does not make one a textard. To be a textard, they must use text-speak constantly for virtually every word in the sentence when it's unnecessary.
AIM discussion:

RosesRed33: Hey, whats up?

Textard41: OMG liek hai!! omfg i saw teh awesomest moveh evar, it wuz amazin, cuz i went 2 teh 1 thtre w/ mah bf that wuz kool, rite??

RosesRed33: Ugh, will you please stop talking like a textard? It's really annoying.
by TheWhatGirl September 10, 2009