Two or more women who have performed fellatio on the same man (not necessarily at the same time) and swallowed his cum.
"You sucked Robbie off too? Now we're Eskimo Sisters!"

Can also be used in the context of the man referring to the women as his Eskimo Sisters:

"Hey, those girls at the bar are cool--let's join them"
"How do you know them?"
"They're my Eskimo Sisters."
"Nice!"
by JacksonDollup October 4, 2013
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An all female group of queens who are as hot as they are intimidating. They have no time for men, but still have kings. If you want to sleep with anyone in the group you have to consider sleeping with them all.
you: "Who is that powerful group of girls over there?"
me: "Oh. Those are the eskimo sisters"
you: "They are so powerful"
me: "Every knee shall bow."

Eskimo sister: "if you wanna be my lover, you better get with my friends."
by SuckMyFuckingToeBitch!!!! January 17, 2018
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When two women have each slept with two of the same men.
Rachel Uchitel slept with Tiger Woods, who was married to Elin Nordgren, making them Eskimo Sisters. Uchitel also slept with Nordgren's current boyfriend, thus making the two women Double Eskimo Sisters.
by PeteTortaglion July 19, 2011
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When two eskimo sisters elivate their siserhood with an aerial position of both women riding the same man on his face and cock respectively and the joining of hands.
"That time Marilyn Monroe and Jackie Kennedy slept together with JFK, they totally became French Eskimo sisters. They even high - fived."
by AylaDilara March 19, 2014
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A girl that has fucked your eskimo brother but not you
Bro, I was about to get with this chick but she fucked Chad.

Dude, never fuck your eskimo sister in laws. That's almost incest.
by Callmedad42 July 23, 2017
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Two chicks who slept the same mister
F*** that those bitches are Eskimo sister
by Ggwhyme22 October 1, 2018
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when you and ur friend kiss the same guy
sarah-“we kissed the same guy” jess-“omg we r eskimo sisters”
by penis tip 27 January 14, 2022
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