Originally Posted by
nomad420
+1
TIPS are To Insure Prompt Service, hence the term. I tip, already stated it above, I don't want to have to wait to get a cocktail when I have maybe 30 mins to get my flight. Not proud of it but some of the bar tenders in various UCs know me. Don't get to the PLs enough for that but still IF the service is good.
This is definitely not the origin of the word "tips", which is much older than the oldest known acronym in English.