1. A phrase said to those displaying overly crazy and/or drunken-like behavior in public, much like that seen in Las Vegas.

2. Can also be said to someone who is flashing an undesirable part of their body.
1. Rachel showed her Vegas when she got hammered last weekend and annoyingly jumped in the pool with her clothes on.

2. When Britney attempted to get out of the car, a paparazzi yelled at her, "Your Vegas is showing!" and the cameras went crazy.
by CreeperStash March 13, 2008
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