Blood sister

The female equivalent of a blood brother. Blood sister can refer to one of two things: two females related by birth, or two or more women not related by birth who have sworn loyalty and friendship to each other. This is usually done in a ceremony, known as a blood oath, where the blood from small cut is mixed and drunk. Much more than just a Best Friend, Blood Sister is your hetero life mate in a non-homosexual way. Blood Sisters share anything and everything; they have no secrets from each other. She is number one in your life, despite significant others and family. Hell, she IS your family. A Blood Sister is your other half. Also known as Soul Sister.