a meatdick is a dumb, muscley bro that is always worried about one upping other people and outdoing others with his toughness. usually they are overly aggressive as well.
Brad: "Oh yeah josh, you think thats a lift? my ford f150 is lifted at least 3 times that, bro"
josh: "Fuckin brad, quit meatdicking me."
josh: "Fuckin brad, quit meatdicking me."
by Dr. Jim Halpert the third January 17, 2008