What does "grit" mean in hockey?

Or... Don't trade for Chris Neil

Grit, moxie, truculence, character, "The Will of the Warrior", these are all words and terms that are thrown around at this time of year when the NHL trading deadline picks up steam. Otherwise unassuming players like David Clarkson, Marty Reasoner or, duh, Chris Neil get thrown around in potential trades on message boards, blog posts and radio stations.