A stupid person; these words are used to express a low opinion of someone's intelligence - dunce, dunderhead, numskull, blockhead, bonehead, lunkhead [N. Amer], hammerhead, knucklehead, loggerhead, muttonhead, dumbass [N. Amer], chowderhead [N. Amer], pea brain, lamebrain, numbskull, twonk [Brit], lunk [N. Amer]
Type of: dolt, dullard, poor fish, pudden-head [US], pudding head, stupe, stupid, stupid person