A term that is used mostly by African Americans when they want to express their opinions but can not think of the correct words. This phrase was made popular in the YouTube video "Mother fucking Bootleg Fireworks-Subtitled Version"

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.

Originates from the expression, "put your money where your mouth is." If you talk shit you better be able to back it up with your money.