[Miscguy]

Does he/she have a boss above them? If so report your boss for calling you a fucking moron. Say you have a hearing problem, or simply have trouble understanding your bosses accent. If not, tell your boss himself/herself: "I dont much appreciate being called a fucking moron simply because you cant enunciate words to the point where they can be comprehended."

Or you can do secret option 3. Grow a sack and fucking quit. You say you only need the job for a month more, i doubt this is true. Unless its a "i cant pay rent, eat, or have power" situation; you can quit.