Look, dumbbell, pay attention!I'm afraid I come on like a dumbbell sometimes.
dumbbell
noun a stupid person US, 1918
dumbbell
slang Someone who is stupid and/or clumsy. Can you believe that dumbbell is still pushing the door marked "pull"?Of course he broke the vase—that guy is such a dumbbell.
dumbbell
n. a stupid oaf. (Also a rude term of address.) I’m afraid I come on like a dumbbell sometimes.