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 trip to a grocery store, convenience store, or gas station for the sole purpose of buying an excessive amount of junk food and sugary drinks, usually with friends. A chud run often happens late at night and ends with everyone involved hating themselves afterwards.