Used to describe an erection that you get from something that you never expected would give you an erection. Puts an official name to the infamous "surprise" boner.

Alternate definition: An erection that one WILL receive while watching Apollo Anton Ohno speed skate; it's inevitable.

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.