Something very difficult, very cool, or anything that needs an extra describing word.
It comes from the term "Kick off the old Croc" , this terms origin is from Paris, Ontario, where people use crocs as kicking tees in rugby.
Girl - "Woah, that girl kicked the ball.."
Random Guy with a Monocle and a Top Hat - "It was a kick off the old croc it was "
- or -
Guy - "Man, that girl is crocin' "