English Dictionary

concrete-head

noun

(colloquial, humorous) A stupid person; sometimes one who is being stubborn to the point of stupidity. / (management, slang) A person who is stuck in their ways; one who is unwilling to try new ideas.

He has a concrete-head when it comes to understanding jokes.

意味（1）

(colloquial, humorous) A stupid person; sometimes one who is being stubborn to the point of stupidity.

As far as I can determine, I am a bleeding heart liberal. Personally I think that's way preferable over a concrete-head conservative, if given a choice between the two.

意味（2）

(management, slang) A person who is stuck in their ways; one who is unwilling to try new ideas.