Having a head that is unusually tapered or small.(adjective)
Foolish; ignorant.(adjective)
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Use "pinheaded" in a sentence
"I hate fags, atheists, muslims, illegal aliens, anti-American malcontents such as pinheaded communist professors (that's to say, 97. 6\% of them, including you), etc ...."
"Props to Damien and Mr Flinthart for their small, quiet war against pinheaded goonery."
"You cleary have too much free time on your hands for pinheaded questions and answers."