Stupid, as though having wood for brains; blockheaded.(adjective)
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Use "woodenheaded" in a sentence
"However, you have to know what to look for (or else leave yourself at the mercy of biased and woodenheaded corporate media pundits)."
"The Daily Growler is definitely an artificial flower, but of the "wood rose" type: it looks like a real blog; it feels like a real blog; it smells like a real blog; and its made out of "everylasting wood," namely the staff of woodenheaded raconteurs that post it daily."
"British flag as from the money-lender, the dividend-drawer and the woodenheaded British official."