You don't belong to this nation of thick-headed numb-skulls.
Ah, the folly of the man to trust such a missive to this thick-headed blunderer!
He had not felt it at the time—not he; a thick-headed, scampering youngster.
I never was in a hurry but some thick-headed foremast-man was sure to get in the way.
Oh, what a thick-headed noodle I am not to have thought of it before!