mario, n.All

Mario is definitely homeless. He wakes up every day wearing the same clothes, runs around in sewers, beats up people for their money, and what does he spend it on? Mushrooms.

Mario is a dude who dresses like a plumber as a quick cover story in case he's caught breaking into castles to do shrooms.

Mario is just an Italian dude on mushrooms who invades a guy's home again and again and tries to kill him and abduct his girlfriend.

Mario is just an asshole that abuses animals, and destroys property all in the hope of getting laid.

Mario is a plumber who does a great many things (medicine, racing, tennis, adventuring, space travel) but plumbing is not one of them.