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2.
the initiation of a gang member that requires them to kill someone.
John wants to join the crips. To join, they want him to blood in. He now must kill an innocent little girl just to be a part of something.
by FalsifyingZACK March 26, 2009
 
1.
acting like a Blood; doing things the way the Bloods would do it.
what are you going to do?

"i'm gonna be bloodin"

or

"I'm bloodin"
by J BAY BAY September 27, 2007