An insult referring to a stupid or dimwitted person, especially one who is muscular but not intelligent.
Compound of 'beef' (muscle/strength) + 'head' (person), suggesting someone with more brawn than brain; American slang from mid-20th century.
This word reflects a cultural stereotype that became codified in language—the idea that muscular strength and intelligence are inversely related, which is actually scientifically unfounded but persists in popular insults.
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