The act of getting a piece of shit or cum and putting it on the inside of a public vending machine. When the item (candy, toy, etc.) drops to the slot, it will land in shit or cum making the buyer disgusted and enraged. Preferably a small candy machine or toy machine works best. A cruel joke to do when bored.
Person A: *jizzes inside vending machine slot.*
Person B: *puts in quaters and cranks handle, reaches in and touches Person A's jizz.*
Person B: AWW WHAT THE FUCK? WHO THE FUCK WOULD DO THIS? THATS DIGUSTING. AUGH ITS EVERYWHERE, MY SKITTLES!!!!!
Person A: Haha, you just got cranked motha fuckaaaaa