The practice of using mystery shoppers to evaluate a business.

To work as a mystery shopper; to pose as a customer or client in order to evaluate a business.

An instance of mystery shopping; a visit to a business as a mystery shopper.

plural of bag of mystery

(slang, humorous) A sausage.

(fiction) A subgenre of crime fiction in which characters must investigate and solve a murder.

plural of mystery-monger

plural of mystery cult

Any of various ancient religious movements in which initiates undergo secret rites to achieve unification with the godhead.

plural of mystery guest