ten finger discount

related to the term "five finger discount", whereas instead of obtaining an item for free by shoplifting, additionally obtaining whatever is currently in the store's register through threat (armed robbery). name originates from the presence of all ten fingers of victims of the discount being in the air (hands in the air).

Timmy was caught claiming a five finger discount on a bottle of Heineken, and thus performed a ten finger discount on the liquor store in retaliation.