Etymology of slot by etymonline

slang ; probably no longer in use AUSTRALIA , 1942 chunk of change a lot of coin slot on a pinball machine US , 1977 3 especially in Quebec , a

A narrow notch, groove, or opening, as a keyway in a piece of machinery, a slit for a coin in a vending machine, etc Webster's New World Similar definitions

coin slot urban dictionary coin-slot: Or: coinslot , slang for: 1 The vagina See vagina for synonyms 2 The rectal opening ; the anus See anus for synonyms

coin qq slot It's difficult to discover who originally coined slang words Although I inserted my quarters into the coin slot, the chips won't come out of the vending