← BackshareGuessdumbhead/ˈdʌmˌhɛd/nounA person who is considered stupid or slow to understand; a foolish person.Don't be a dumbhead—check your work before handing it in.He called me a dumbhead for forgetting my keys again.Only a dumbhead would try to cross the street without looking.SynonymsdunceblockheadsimpletonAntonymsgenius