What is a so-called one-arm bandit?

Question

Accepted Answer

The "one-armed bandit" is an older term that goes back to classic, mechanical slot machines from the early days of the slot-playing industry. These are real life machines that featured a lever on the side that you had to pull in order to spin the reels. One-armed bandit is a slang term still used today for slots of all kinds, even those online.

One-arm bandit