slang A large, strong, typically bumbling or foolish person, especially a man. Sometimes used endearingly. You wouldn't be acting so cocky if that lummox weren't here to back you up. Ah, come here and give me a hug, you big lummox!
lummoxand lommix and lummux (ˈləmɑks and ˈləməks)
n. a heavy, awkward, stupid person, usually a male. Sam is what you would call a lummux—but not to his face, of course.