QUACK

Mountebank

• Charlatan

• Disreputable doctor

• Do like Donald

• Doc who's a crock

• Dubious doctor

• Duck sound

• Ducky declaration

• Malpractice suit target

• Malpractice target

• Nostrum purveyor

• One selling bottles of sugar and arsenic, say

• Phony doctor

• Phony physician

• Sham doctor

• Snake oil salesman

• Sound from the pond

• Unlicensed physician

• An untrained person who pretends to be a physician and who dispenses medical advice

• The harsh sound of a duck