1. the way a person carries himself after a relationship to show the opposite sex he is "single and ready to mingle"
2. all the crap, presents, etc. you get to keep after a break-up
Ex. "Did you see Caleb's post-relationship swag? It's obvious he's ready to move on."
Ex. "I'm burning all the pictures because I don't want to keep the memories, but I'm definitely keeping this Tiffany's bracelet as my post-relationship swag."
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