Micturate

Don't say you need to micturate, it makes you sound like a wanker. Just say you've got to go piss like a normal person.

Source: tatoeba (13359239)

David Lynch himself uses the down-time between takes to confer with A.D.’s and producers and to drink coffee and/or micturate into the undergrowth, and to smoke American Spirits and walk pensively around the Mercedeses and camera truck’s technical fray, sometimes holding one hand to his cheek in a way that recalls Jack Benny.

Source: wiktionary

Jeffrey Lebowski: So every time -- I just want to understand this, sir -- every time a rug is micturated upon in this fair city, I have to compensate the (owner) --?

Source: wiktionary