NEWS: Jermaine Dupri (@Mr_Dupri) Gets Tipped $3800 To Play A Song In Las Vegas

The rapper was spinning at TRYST nightclub at the Wynn Hotel on Saturday … when some super rich guy — known as “Su Su” — dropped $90k on a 15 liter bottle of Ace of Spade Rose Champagne … plus an extra $40k on other fancy booze.

Sources tell us club honchos were so thrilled about the purchase, they asked Dupri to give Su Su a special VIP shout out.

Dupri not only obliged … but he was so impressed with the purchase, he LET THE GUY REQUEST A SONG!! Which — if you’ve ever been to Vegas — never happens.

It gets better … “Su Su” was so thankful Dupri actually played his tune — Pitbull’s “Give Me Everything” — he stuffed an additional $3,800 cash in his pocket as a tip!

“Su Su” tells TMZ … he was “happy” to throw down the cash because he loves Jermaine and thinks he’s a “bomb” DJ.