A person that has the propensity to use the acronym Y.O.L.O. (You Only Live Once) in irrelevant situations as a subconscious attempt to feel either cool, hip, younger or more attractive. Although some believe that the latter is not always true, other theorize that individuals who use the cliche phrase constantly have a deviant obsession with it to the point of fetishism. Hence the condition, Yolosexuality.
Michael: Dude, I'm thinking about getting pasta for dinner tonight but I'm not sure yet.
Tim: Go for it Mike. YOLO!
Michael: Bro, you gotta chill. I'm starting to think you might be a yolosexual