Hey !! I learned pissiare in my Latin classes -- and that was in High School!!
Well, to be honest - I may have learned it, but simply don't recall doing it! Makes sense I would have, since my professor taught for a couple of years at the Jack Karouac School of Disembodied Poetics (Naropa Institute - now University) in Boulder, Colorado . . . he was totally 'cool, man' - yeah know?
I do remember that he once gave us a pop quiz with only one phrase. We agonized over it - the words were easy enough to translate, but it was obviously idiomatic. After an hour or so, he took pity on us. He had written the phrase himself - it was the Latin version of:
"That dog don't hunt"
I can't recall it exactly, but it used canis and some form of indagare . . .