Quack'sal·ver noun [ Dutch kwakzalver ; confer kwakzalven to quack or boast of one's salves. See Quack , Salve , noun ] One who boasts of his skill in medicines and salves, or of the efficacy of his prescriptions; a charlatan; a quack; a mountebank. ... Found on http://www.encyclo.co.uk/webster/Q/1