The raspy, gravelly voice one has after returning from a bender in Vegas. Generally accompanied by no ailments other than a pounding hangover. Lasts 2 - 3 days after returning to the real world. Vegas Voice is often attributed to throwing back ungodly amounts of booze, smoking cigarettes and cigars, and making other ill-advised decisions.
Anna: Speak up, Mikey, I can't hear you whispering that you love me.
Mikey: Sorry sweetie. This Vegas Voice has me talking like a 90 year old with emphysema. Thanks again for letting me make the trip!