Top definition
Having sex during a layover in the airport. In order for it to be a true slayover you are not allowed to pass airport security, other than that any place you can find is fair game.
Friend: Glad your back from vacation, what was the best part of your trip?

Me: The Grand Canyon was amazing, but I would say that best par of the vacation was my slayover in Milwaukee.
by Dougie's Going Deep March 08, 2013
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