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The act of typing something but missing letters out or mixing things up. Normally occurs when people are hyper, high or even smashed out of their face.
MSN conversation:

Keith : Hey, what did you do tonight?
Kevin: Well to strt i wnet to that praty over th streeet
Keith : Dude are you drunk or something?
Kevin : No wy????
Keith : You have a terrible case of Typlexia!
by eatrob January 30, 2010
"Typlexia is a rare, incurable disease whose scientific name is 'kebordium typlexia'.

This devastating condition causes its sufferers to misspell and mistype words which they know perfectly well how to spell. In a sense, typlexia is a little bit like a written form of Tourette's syndrome."

Note: The proper spelling for the word is typlexia; typelexia (notice the extra e) is defined as how a person suffering with typlexia might mis-type the disease.
Typelexia nervosa occurs in nearly half of all typlexia keybordium sufferrers. This variant is a mutation of the typlexia keyboridum disease which usually only strikes web developers and Instandt Messenger program users. When in a hurry, typlexia nervosa sufferers mis-type nearly ever common word imaginebale.

There is no known cuere for eeither variation of the disease, however htere are wasy to treat the symptoims.
by Angela Buraglia October 05, 2007