The term 'TIP JAR BILL, OFTEN' is a three-word phrase that refers to the practice of leaving a TIP in a JAR or other container for a service provider. This is often done in restaurants, bars, and other establishments where customers receive services from employees. The first word, 'TIP, ' is an acronym for 'To Insure Promptness, ' which is a reminder to customers to leave a gratuity for the service they received. The second word, 'JAR, ' refers to the container in which the TIP is placed. Finally, the third word, 'BILL, ' is a reference to the amount of money that is left as a TIP.