moun·te·bank /ˈmaʊntɪˌbæŋk/
  江湖郎中,騙子
  Mount·e·bank n.
  1. One who mounts a bench or stage in the market or other public place, boasts of his skill in curing diseases, and vends medicines which he pretends are infallible remedies; a quack doctor.
     Such is the weakness and easy credulity of men, that a mountebank . . . is preferred before an able physician.   --Whitlock.
  2. Any boastful or false pretender; a charlatan; a quack.
     Nothing so impossible in nature but mountebanks will undertake.   --Arbuthnot.
  Mount·e·bank, v. t. To cheat by boasting and false pretenses; to gull. [R.]
  Mount·e·bank, v. i. To play the mountebank.
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  mountebank
       n : a flamboyant deceiver; one who attracts customers with
           tricks or jokes [syn: charlatan]