blood brother(redirected from a blood brother)
A boy or man who has sworn loyalty to another despite not being biologically related. When Jake and Tim entered the battlefield, they became blood brothers, vowing to protect each other from harm's way.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
n. a fellow black male. (see also blood.) One of the bloods came up to say hello.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.