No. Giving away the ending of a movie means telling people how the plot turns out in the end, thus damaging their ability to enjoy the movie.
Getting pissed can mean getting angry or getting drunk. I would say the former is more common in AmE and the latter in BrE.
Your passage appears to be about and among movie people. A take is movie jargon for an attempt to shoot a scene. Getting peed on during a take might indicate that the movie in question was some sort of porn, or more likely it might mean being seriously disrespected during the take. I'm not sure.
Student or Learner