Rihanna knows EXACTLY how to please a man … especially if that man is a waiter, because on Friday she gave one lucky server in Hollywood the biggest tip of his food-slangin’ career.

Reports TMZ:

It all went down at the Laugh Factory comedy club — Rihanna was there with 6 of her friends … downing drinks and listening to Dane Cook tell “jokes” on stage.

But when the bill came … a measly $80 … we’re told Rihanna asked her waiter what the biggest tip he ever received was. He said $100 … so Rihanna slapped $200 into his hand and replied, “Now I’m your biggest tip.”

If only he said $1,000…

And now…

This is EbenGregory.com…telling you sometimes I point out the stars to you and all you saw was the tip of my finger. But you don’t hear me doe.