Sharks, look elsewhere.
A thrasher is a skateboarder from the 80’s. A thresher is a device used in wheat harvesting, or a kind of shark that, according to legend, can take off a man’s head with its long, blade-like tail. The Quiksilver Thrasher Wallet would prove useful to the skater or someone operating a thresher, but never, ever to a shark. They have no pockets, and no concept of currency or a barter economy.