1 definition by RUkiddin'me

Top Definition
A friend or family member who maintains the highest standards by hooking up and having children with two members of the same family.
Jane Doe hooked up with John Doe, had a son..then hooked up with John Doe's brother and had another son..therefore the kids are not only brothers they are also cousins.

Brothers+Cousins = Brosins
Brosins - pronounced Brah-sins
by RUkiddin'me August 03, 2011
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