Wallet dieting
Trying to get rid of your spare change that make your trousers seem like they've got a dozen pounds of lead inside them by purchasing stupid things with coins
Guy 1: Dude, you got a belt? All this change in my wallet is making my pants look like Lil Wayne's at the VMAs!
Guy 2: Bro, go wallet dieting.
Guy 2: Bro, go wallet dieting.