When somone vomits their emotions and feelings on you or when they jump to conclusions about how you feel based on no actual evidence.
(After a 10 minute venting session)...Guy 1: "You think I'm stupid don't you? You just think I'm the dumbest person after what I just told you"
Guy 2: "Bro, you're projaculate (ing). I have literally have been just listening this whole time"