blood brother

American  

noun

1. a person's brother by birth.

2. a male person bound to another by ties of great friendship.

3. something usually associated with or thought to exist inseparably from another thing, quality, circumstance, etc..

   Humility is often the blood brother of patience.

4. a male established in a close relationship with another male through the performance of a specific ritual, as the commingling of blood.

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blood brother British  

noun

1. a brother by birth

2. a man or boy who has sworn to treat another as his brother, often in a ceremony in which their blood is mingled

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Other Word Forms

• blood brotherhood noun

Etymology

Origin of blood brother

Middle English word dating back to 1350–1400

Example Sentences

His own blood brother and handler Man tries to make Captain admit that he's more American than Vietnamese now.

From Salon

And with the same blood running through their veins, the two strangers are now planning to remain in touch as "blood brothers".

From BBC

“Gangsta Boo was like a sister to me and told the world about me the way my blood brother did,” Drumma Boy said in a statement.

From Seattle Times

With a slight hesitation, he then asks, “but is we really brothers, you know, blood brothers or not, you and me, whatduhyathink?”

From New York Times

But he grew closest with Roberts, who dubs him “good as gold as a friend” and a “blood brother.”

From Washington Post