Someone who is so stupid beyond belief that you actually can't begin to fathom it. They have smoked and drunk themselves retarded, and have not gone to school since the 3rd grade. A Tyler will spend all hours of the day playing dumb violent video games, and only stop and think about the contents of their bellybutton or how big that girls tits are. Anyone that spells the word "really" wrong or thinks Geography is the study of blowing up Arabs, they are probably a Tyler.

It’s an acronym standing for Can’t Remember A Fucking Thing. It’s usually used to describe embarrassment at being unable to remember someone (CRAFT moment); going onstage as the lead in the latest theatrical performance and your mind goes completely blank (CRAFT situation); the next morning after a night when you got pissed as a fart and woke up in bed cuddling a traffic cone and a string of fairy lights wound round your prick.