- Numbskull is an alternative spelling for numskull, a dumb or foolish person.
A person who routinely does stupid things and makes a fool of himself is anumbskull.
numbskull definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
numbskull definition by American Heritage Dictionary
Variant of numskull.