One who does more than his/her fair share of whining and/or complaining, much like that of a toddler in a high chair. A spoon banger--in adult terms--may be a stubborn person who complains about everyday functions.

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.