I don't know , I don't have a damn clue

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.

it is a "word" or term literally used to make one's rap rhyme better or to fill in some spaces. it originates from bay area rap and the hyphy movement

It means what ever you want it to mean.

It comes from a hyphy song by Mistah fab.