WTClemp
A phrase indicative of a mistake made (usually a simple typo) due to Clemptor, also know as Clemp for short. Made famous for it's use in the popular online networking site, IFHY.
Person 1: Waht's up guys?
Person 1: WTClemp!?
Person 2: Haha. You fail.
Person 1: WTClemp!?
Person 2: Haha. You fail.