Loose Mushroom Posted in L Best definition Loose Mushroom A very dangly, loose vagina. Guy 1: Damn, Phi is a loose mushroom. Guy 2: I thought Phi was a guy? Guy 1: Me too! Guy 2: What? How satisfied are you with the definition? Looking for Loose Mushroom meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 62 times.