A general term used for a man and a woman who share or have shared sexual partner(s) of either gender
As Tina tells Ron about how bad Tyrone was in bed, Ron responds, "My experience was quite the opposite."
They giggled into the night about being eskimo siblings.
by 2tyronefers April 13, 2014
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When two people have had sex with the same person, but not necessarily each other. They can both be male, both female, or opposite sex.
"Hey Jill, I made your boyfriend Bill my bitch in prison."

Jill: "Oh cool, I guess that makes us eskimo siblings!"
by KateMinus8 March 25, 2014
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When you and a buddy wank off to the same person. Derived from Eskimo siblings.
Brian and I are Eskimo step-siblings through Michael from HR
by Justclowntingz May 14, 2020
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