Check out this video:
Snowboard Trick Tip: Buttered Pretzel - YouTube
The guy is using what he
calls counter-rotation, and I'm pretty sure it's what ras means by the term. This may or may not be a discussion of terminology, but there is definitely
a technique that exists where you prewind your body and then release that prewind to effect (or stop) a rotation.
I'm fairly certain that Nev uses the term too, because that's where I got it from. (and no, I'm too damned lazy to review every video looking for it)