Definition

The fashion chasm that exists when one half of a couple is serving looks while the other is serving "I gave up in 2015." This sartorial disparity often manifests at events where one partner is runway-ready and the other looks like they're about to mow the lawn. It's the visual representation of "opposites attract," except one opposite clearly has a stylist.

Example Usage

Jessica showed up to the wedding in a designer dress while Mark wore his favorite cargo shorts—the swag gap between them was wider than the Grand Canyon.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=Swag%20gap&defid=18553601)