Pronunciation: [spˈɛnd ɐ pˈɛni] (IPA) 
The phrase "spend a penny" is a common British euphemism for using the restroom. It originated from the coin-operated public toilets that were once common in the United Kingdom, where it would cost one penny to use the facilities. The spelling of "spend a penny" is transcribed as /spɛnd ə ˈpɛni/ in IPA phonetic notation, with emphasis on the first syllable of "spend" and the last syllable of "penny."
"Spend a penny" is a colloquial British expression that refers to the act of using a public restroom or lavatory, specifically to urinate. The phrase is often used to politely indicate the need to use the toilet or relieve oneself, particularly when in public settings or among unfamiliar company.
Originating from the early 20th century when public toilets in the United Kingdom required the insertion of a penny coin in order to access the facilities, "spend a penny" soon became a euphemistic way of communicating the need to use the restroom. In this context, the term "spend" means to expend or use up, while "penny" refers to the coin required for entry.
The expression has evolved to become a widely recognized idiom in British English, commonly understood to signify the need to relieve oneself in a casual or light-hearted manner. As such, it is often used humorously or informally in conversation, particularly among the British population.
While "spend a penny" is rooted in historical context, it is now detached from the coin-operated toilet systems that originally inspired it, as most public restrooms in the UK are free to use. Nonetheless, the phrase has persisted throughout the years and has become ingrained in British culture, maintaining its presence as a widely understood expression.
