a coin purse
A coin purse is basically a man’s testicle bag. It’s where you hide your nuts and your shame when you’re caught without pants.
My uncle’s coin purse got caught in a zipper. He yelled, 'I’m not gonna let a zipper take my dignity!'
My neighbor showed off his coin purse at the grocery store. The cashier just stared.
My friend’s coin purse was so big, he called it his 'nut mansion.'