This is what they mean by a sly fox.

Chris Hargreaves was enjoying a round of golf with some friends in Ireland when a fox approached his bag, stick his nose inside and then dart off with his wallet.

Walking right up to someone's property and rifling through it while that person looks on right in front of you is pretty wild. Guess you can say that makes this animal crazy -- crazy like a fox, right?

The creature didn't make it too far, though. Hargreaves chased him and the fox quickly dropped the wallet. So, in the end, it all worked out for Hargreaves. He gets to tell a fantastic story and managed to keep all of his money. Considering all the cash you could lose betting, that's not too shabby for a day on the links.