To "maura out" of something is to bitch out at the last minute after promising that you would complete said action. One who "mauras out" usually profusely promises to do it the next time, but of course the next time he or she promptly mauras out once again.

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.