The term MARK UP, SAY can be summarized by two crossword solutions: RETAG (5 letters) and WRITEUPON (9 letters). MARK UP, SAY is a phrase used to describe the process of increasing the price of a product or service. This is often done to increase profits or to cover the cost of production. RETAG is an action that involves changing the price tag on a product or service. WRITEUPON is an action that involves writing the new price on a product or service.