A yellow photographic / videographic lens filter, making the entire scene look as though somebody had urinated all over the place -- on people, walls, furniture, plants -- I mean EVERYTHING!
A good part of the movie,"Behind Enemy Lines II" was filmed with a damn piss lens!
When someone is piss pilled, it means that they are generally an angry person who is always pissed off, and will likely be miserable their whole lives due to their constant irritability. Dubbed piss pill because of the whole red pill/blue pill whatever pill concept of the matrix, but unlike the other pills, the piss pill makes it's users live a live of "pissful ignorance," or live a life where everything sucks and they're always pissed off.
Person 1: "Bro what's that guy's problem? Why is he such a jerk?"
Person 2: "Ah don't mind Ryan. He's always like that. He's Piss pilled."