numskull (plural numskulls)
- (derogatory) A dunce, mentally dull or stupid person.
- (derogatory) A person who refuses to learn or grow mentally.
- That numskull will never learn how to compose a letter.
- A traditional name for a fool who serves as the butt of jokes about stupidity.
mentally dull or stupid person
- Webster's Seventh New Collegiate Dictionary, Springfield, Massachusetts, G.&C. Merriam Co., 1967