slot machine

a machine worked or started by inserting a coin or token in a slot; specif.,

a vending machine
a gambling device having a lever that is pulled to spin disks and turn up symbols, various combinations of which determine the results

See slot machine in American Heritage Dictionary 4

noun

A gambling machine operated by inserting coins into a slot and often by pulling down on a long handle.
A vending machine operated by inserting coins into a slot.

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