2. Let cat try to drink your piss then *accidentally* piss on cat but make sure not to get the piss in it's eyes. It only takes a dribble, you don't want to hurt the cat but just make the cat not want to cross your stream. This may start a piss war with cat where cat will piss on everything you love but it probably already does that if it's a stray. Assuming cat isn't a piss fetishist this should solve your problem(the short game). You could probably simulate this with a water bottle or gun so you don't actually have to piss on your cat like a psychopath.