The White Russian is a don't if you keep ordering them.

"The White Russian is a damn good drink... after dinner or as a closing cocktail," says Turner. "If you're slamming down 3, 4, 5 of these, I start to get concerned."

That's because the milk and alcohol are a dangerous mix in the stomach, he warns. "I've had to watch countless barracks clean up" the aftermath.

Do yourself, your friends and your bartender a favor by ordering an Espresso Martini instead, he suggests. "You get your caffeine" without the potential trouble.

Next: Watch Derrick Turner make 3 classic cocktails