There is a music video of that name by Kane and Able. A group of black thugs and thugettes. The lyrics are also published. I don't speak thug or ebonics, but what I can translate is violence and drugs.
IMHO, IF Martin did like and emulate the thugs on this video, he likely thought he had a chance to get his thugs “credits” one on one with Zimmerman.
http://dailycaller.com/2012/03/29/second-trayvon-martin-twitter-feed-identified/
March 31, 2012
Second Trayvon Martin Twitter feed identified
FR thread:
http://www.freerepublic.com/focus/f-news/2866397/posts