Slot Definition

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

A 10 cent coin Long ago in the dim mists of the 20th century, a payphone call was a dime, which was dropped into a coin slot in a tiny building

coin up slot Term used to describe a particular style of a girls pussy where the outer lips completely cover the inner parts, leaving only a very thing slot between them

coin slot keychain slot machines to mean any machine with a coin slot , it would have had no occasion to imply a more narrow meaning slang contraction of slot machines as