The Concise New Partridge Dictionary of Slang and Unconventional

It's referring to the 50p coin not being round I remember it being an odd shape, it's a heptagon Reply Kevin Gregg says:

Coin-operated definition: activated by inserting a coin or coins into a slot Slang · Emoji · Memes · Acronyms · Gender and sexuality · All pop culture

coin slot machine tricks Poker Machine · Slot Machine · Coin Machine, Coin-Operated Machine · Liberty Bell Online casino liberty bell · Fruit Machine · Chewing Gum Dispenser · RTG slot games

coin flip slot Coin slot — can refer to: A coin receptacle on a vending machine A slang term for buttock cleavage This disambiguation page lists articles associated with the