A person hired by market research companies or manufacturers, etc., to visit or telephone shops or service providers anonymously in order to assess the quality of goods, helpfulness of staff, layout of premises, etc. Found on http://www.encyclo.co.uk/local/22643
A person hired by market research companies or manufacturers, etc., to visit or telephone shops or service providers anonymously in order to assess the quality of goods, helpfulness of staff, layout of premises, etc.