Stupid, foolish, or slow-witted; having the intellectual capacity attributed to a cabbage.
From 'cabbagehead' plus '-ed,' forming an adjective. The insult builds on the association between cabbages and stupidity.
The insult 'cabbageheaded' reveals that people have always compared their dumbest enemies to plants, and cabbages—bland, round, and quiet—bore the brunt of that mockery!
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