mad money - The little bits of cash you carry around like a nervous kid,

The little bits of cash you carry around like a nervous kid, just in case you need to buy a snack or bribe someone.

I had mad money in my pocket and used it to buy candy from the vending machine.

My sister carried mad money just in case her crush asked her to prom.

I had mad money and used it to pay for my dog's hair cut.