Quote:
Originally Posted by Nordhagen
T- to
I-insure
P-prompt
S-service
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From the Google Machine:
While the etymology of "tip" as an acronym for "to insure prompt service" is a popular belief, it's actually a myth. The term "tip" is thought to have originated from the phrase "To Insure Prompt Service," but it's more likely related to the Old English word meaning "to give". In modern usage, a tip is a gratuity, a gift of money given for good service.