Noun
a slot machine that is used for gambling
Source: WordNetone armed bandit
Your email inbox is a bit like a Las Vegas roulette machine. You know, you just check it and check it, and every once in a while there's some juicy little tidbit of reward, like the three quarters that pop down on a one-armed bandit. And that keeps you coming back for more. Douglas Rushkoff
they spend hours and hours just playing the slots Source: Internet