noun
a person with a small or narrow head, often used as an insult
-
The scientist used a pinhead to carefully place the tiny specimen under the microscope.
-
Don't be such a pinhead and remember to bring your umbrella in case it rains.
-
That guy is a total pinhead for thinking he can outsmart everyone.
-
Her stubbornness makes her a real pinhead when it comes to accepting other people's opinions.