(1):
(v. i.) To play the mountebank.
(2):
(n.) 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 infalliable remedies; a quack doctor.
(3):
(n.) Any boastful or false pretender; a charlatan; a quack.
(4):
(v. t.) To cheat by boasting and false pretenses; to gull.