You are driving through in a smallcountry town, and need to wee. You are singing along with the Pixies and her her to stop at a "place of urination" several times, until you drive over the kerb and go off-road into the park to get to the place of urination to relieve yourself.
The term can be used any time you need to relieve yourself.
a urinal is like a toilet, but it hangs off the wall and you piss into it. Urinals are a regular place for drug addicts and sick weird perverting individuals to meet up and do all sorts of gross things to each other or to themselves.
jonnie: why does ryan allways hang around the urinals?
me: probably either to shoot up or to get nasty with perverts.