tip(s) is an acronym. To Insure Proper Service. The tip is supposed to be given before any order/transaction is done. But that is no longer the case. I think the whole idea of tipping is outdated and screwed up. no one is supposed to give a tip. it is just a way of showing you did a good job. when i wait tables or bartend. i always give all their change back even if they say the rest is for you. i consider it to be rude when a waitperson gives me a great deal of change. but then again, what if i am giving you the right change. if youve got the cash and paying with big bills im gonna give you the 20's back for a big tip. but im not that way, just would like you to see the opposite side of it. then again, im in grb which is nothing like the outside world.