340: Pee and Piss Nov 13, 2015
There are a great number of terms for urine in English. Some are medical, some are technical, and some are informal or slang-terms. One of the most common is the word 'pee', which is fairly recent. It is a euphemistic use of 'piss', simply using the first letter. Acronyms and initialism have not been used in English for a long time, but in this case it was a way for people of the late 18th and early 19th centuries to scoot around the term.