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A brolationship between two inseparable bros that allows for other bros to join the intense bro-bond. Unlike most open relationships, a bropen brolationship allows for an endless amount of bros to join (if they are worthy).
Dude 1: Bro, you've been bros with John for 5 years now; you sure he's alright with you broing it up with me so often?

Dude 2: It's cool bro; we're in a bropen brolationship!
by Brahfizzle April 30, 2012
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