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The offspring of siblings who marry siblings, who are doubly-related cousins. For example, if there are two brothers, Joe Smith and John Smith, and two sisters, Jane Doe and Jenny Doe, and Joe marries Jane, and John marries Jenny, their children will be super-cousins and twice as related as normal cousins, sharing likeness and many characteristics more so than normal cousins.
"Jim and Jack are cousins, but they look and act exactly alike!"

"That's because they're super-cousins."
by Joe Pareto April 19, 2008
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When you are first cousins with somebody on both sides of the family and there SHOULDN'T be and incest involved but you aren't 100% sure. You are twice as related to them than an average cousin.
Lucas is my Super Cousin because his dad and my dad are brothers and his mom and my mom are sisters. I'm pretty sure nobody fucked their own sibling.
by supercousin July 20, 2019
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