The story
From the act of putting a (pre-decimal) penny in the slot of a pay-toilet cubicle.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: To use the toilet. Full definition →
From the act of putting a (pre-decimal) penny in the slot of a pay-toilet cubicle.
Etymology from Wiktionary, CC BY-SA 4.0.