Derived from the term "eskimo brothers", inuit sisters is a common bond shared between two or more women who have slept with the same man.
Dieondra: "Ayo Charice, you sleep with ya boy Trayquan last Wednesday?"
Charice: "Hell yuhhh!!!"
Dieondra: "Yeahhh well I did too, 'cept on Tuesday!"
Charice: "Dayummm, looks we be Inuit Sisters mah girl."