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!"
A small piece of information. Derived from the word ken, used often in the scottish language and is synonymous with knowledge.
Person 1: "Hey I don't get this shit. How do you solve this problem?"
Person 2: "I got that one. Give me some kenlets on this assignment and I'll help you w/ that one."