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2.
Verb:

To make bones about something is to cause trouble, start shit, or generally raise hell. Usually unnecessary.
"I heard you got in a fight with Richard."
"Yeah, we were having a good time and he thought we were noisy, so he decided to make bones about it.
by Brickwork March 07, 2010
 
1.
To gain initiation into a criminal organization by competing a hit. Most common amongst street gangs and organized gang members.
Well Johnny you're almost an official member of the Gambino Family. To complete your initiation you must make bones: kill an Irish Mob soldier. Complete this, and under the authority as a Gambino Consigliere, the Family will welcome you with open arms.
by wildcard9 March 19, 2010