Blood brother
Male not related by birth who has sworn loyalty
Blood brother
Blood brother can refer to two or more people not related by birth who have sworn loyalty to each other. This is in modern times usually done in a ceremony, known as a blood oath, where each person makes a small cut, usually on a finger, hand, or the forearm, and then the two cuts are pressed together and bound, the symbolism being that each person's blood now flows in the other participant's veins.
Read on Wikipedia · Image Mårten Eskil Winge, Public domain
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