flum·mox I. verb alsoflum·mixorflum·mux\ˈfləmə̇ks, -mēks\ (-ed/-ing/-es) Etymology: origin unknown transitive verb : to throw into perplexity : embarrass greatly : confound, disconcert intransitive verb : to fail or give up : collapse < his scheme flummoxed and left him high and dry > II. noun alsoflummixorflummux\“\ (-es) : failure; also: a state of confusion, perplexity, or embarrassment