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To be involved in a bromance and/or brolationship with 3 or more more bros.
(Daniel sees a new picture of Nick since he has been working out)
Daniel: Lookin' good brah!
Brian: Daniel would like to start a bromance with you and be in a brolationship...
Daniel: Hell yes!!!
Nick: Does this mean Brian doesn't want our brolationship to work out? That makes me sad big man...
Brian: We can be polybromorous...
by LB87 June 26, 2012
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