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.

Any boastful or false pretender; a charlatan; a quack.

To cheat by boasting and false pretenses; to gull.

a flamboyant deceiver; one who attracts customers with tricks or jokes

12.29.12 Deceiver, fake healer

A trickster or an entertainer.

To play the mountebank.