A boy that you hang out and hook up with often and you do everything that a couple does, minus the romance and the title to define your relationship. It's an awkward situation because you will eventually have to "break up" even though you were never really dating. See friends with benefits
Friend 1: "So what's goin on with you too?"
Friend 2: "Well, we hang out all the time, hook up, and he gets jealous if I see other guys, but he's just my psuedo boyfriend. We're definitely not dating."