Someone who thinks they’re great at everything, but are actually terrible at them. A Hiney Noob is known to be very aggressive and demanding towards other people, but bring nothing to the table themselves. Never listen to a Hiney Noob.
Friend 1: “Brah my boss sucks. He does not know how to run his company at all.”
Friend 2: “Sounds like a real Hiney Noob brah”