dunderhead

But I loves a fool; an youre the biggest dunderhead I ever knowed.

He who would convince the worthy Mr. Dunderhead of any truth which Dunderhead does not see, must be a master of his art.

Then, arising, she donned her best frock and neatest cap, and proceeded to the Castle Dunderhead.

That same afternoon the proclamation was issued, and Catherine carried a large gray goose to Castle Dunderhead.

Tom, you dunderhead—what do you mean by making an ass of yourself this way?