weed man noun2 •(slang) A male drug dealer or dispenser who specializes in cannabis.He told me you were his cousin and that he was going to show you the weed man's house, so you could purchase your weed,” I said. — 2012 •A man who destroys weeds, especially one who works in agricultural weed suppression.I acted in an advisory capacity to them until they could get a better weed man than I am to help them in their own staff. — 1947 formsweed men