No such thing and as a swiveling gator except maybe a swamp gator chewing on lunch.
Swivel crimps are only designed to swivel during installation, then they don't swivel anymore. Or if they do swivel, they will leak. At least that's been my experience.
Quick Disconnects, QDs swivel plenty and they don't leak (assuming the male and female are from the same family and the orings inside the female are in decent condition). It helps to squirt some Cool Cuff Lube into the female once in a while.