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beautiful vault n.— «Slot machines are sometimes called “beautiful vaults” in the industry because they bring in nearly three-quarters of the roughly $60 billion in gambling revenue that American casinos generate.» —“Slot Machines...
plastic pony n.— «An increasing number of punters are turning to football and other sports, but the fastest growth area has been in fixed-odds virtual games, from touch-screen roulette slot machines to computer-generated horse races—known...
kalo-kalo n. a slot machine or casino; (hence) a jocular reference to the financial affairs of Nigeria. Also kalokalo. (source: Double-Tongued Dictionary)