In our house hold it is commonly referred to as the dunny, though strickly speaking this is a bit course.
Although the land can handle a little pee, we don't allow peeing in the bushes as it attracts flies which bring disease - not to mention smelling really bad to those camping nearby!
According to ancient legend, there are 10 key traits all ninjas possess:
Other people's euphemisms always seem more ludicrous than one's own.
You mean it's like Cockney rhyming slang in reverse without the rhyme?
And Americans can certainly hold their own pun intended in this department too, with phrases such as taking a leak; taking a wiz; go potty; piss like a racehorse; go see a man about a horse ; and take a squirt. Always use the official toilets, and close the lid when you're finished.
A Comparison of British and American Toilet Euphemisms
Potty Talk: 22 Expressions with “Toilet” in English – RealLife English