1) The purposeful disregard for all manner of spelling, grammar, and punctuation in order to limit thoughts to 140 characters. -OR-
2) The unintentional consequences of frenzied and careless texting/typing on tiny cell phone buttons without auto correct
(*Not to be confused with illiterate, illiteracy)
"John just texted me, 'I b thr 8 tmrw bring beer'... Damn, he's so ill literate!"
My Friend's Facebook status reads: "dam im having th wurst day ever! car broke and can fix te radator no $."
... I can't understand this ill literate shit!