The term AD CATCHPHRASE is a combination of two words: 'AD' and 'CATCHPHRASE'. An AD is an advertisement, while a CATCHPHRASE is a phrase or expression that is used repeatedly and is associated with a particular person, group, or idea. The term AD CATCHPHRASE is used to describe a phrase or expression that is used in an advertisement to promote a product or service. It is usually catchy and memorable, and can be used to create brand recognition and loyalty.