WOW

From OAPedia.com

WOW

WOW - Whip-em Out Wednesday (or Whip-em Out Whenever) - the greatest Radio Promotion ever! By displaying a WOW Sticker on your car, you are not only helping to spread the word (Spread the Virus) that Opie and Anthony are back on XM Radio, but it is also a signal for female motorists encouraging them to show you their boobies!

The History of WOW (oavirus.com)