ninnyhammerEtymologyApparently from ninny (although attested slightly later) + -hammer, of unknown origin; perhaps compare earlier hammer-headed.ninnyhammer means A foolish person; a simpleton. Lexicurio rates it Sui generis — a strength score of 87 out of 100.nounA foolish person; a simpleton.“1608, A Yorkshire Tragedy, dubiously claimed to be by William Shakespeare Why, the more fool she; aye, the more ninny hammer she.”