by d q master June 13, 2005
A dumb nut is a person who thinks highly of themselves but realistically they are very quite dumb which is where the Term Dumb Nut comes from.
by Raredog21-69 August 09, 2018
An idiot, a moron, someone who doesn’t listen, a know it all with no street sense, a pain in the ass who wants to run the show who has no experience, a bully who acts like a victim.