(1) To cancel on plans out of nowhere, usually to do something else. (2) To disrespect someone, usually in a way that makes the one being twirled initially think the one doing the twirling has good intentions. See curved.
(1) Damn bro, we were all gonna meet up at the park after school but half of our group twirled to go to Mcdonald’s.
(2) My girl really twirled me when she said she wasn’t talking to other guys and then did it behind my back.