saltimbanco

from The Collaborative International Dictionary of English v.0.48

Saltimbanco \Sal`tim*ban"co\, n. [It., literally, one who leaps
   or mounts upon a bench; saltare to leap + in in, upon + banco
   a bench.]
   A mountebank; a quack. [Obs.] [Written also {santinbanco}.]
   [1913 Webster]

         Saltimbancos, quacksalvers, and charlatans. --Sir T.
                                                  Browne.
   [1913 Webster]