A mentally incompetent; stupid, or dumb person.
Micah you are such a T-tard. I can believe you got caught cheating on the test!
by ImTheRealNathan May 13, 2018
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adj. the inability to use t9 (predictive text). t9 was designed to make typing text messages easier; however, the user must be smarter than the phone for feature to work properly. t-tardedness is enhanced with alcohol consumption.
"dude - do you ever read your nonsense texts before pressing the send button? you're totally t-tarded!"
by Irish Goddess August 26, 2008
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Anyone who is very bad at texting. Thought to originate from 'T9-tard' - people who fail to fix their T9ed texts.

e.g.
dont fuck with me - correct T9
foot dual with of. - usual T9 typo.
Nick is such a t-tard that I'm thinking of buying him a blackberry.
by Envious 314 March 16, 2009
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