According to the Urban Dictionary, this phrase is “an old piece of advice that still rings true today..indicating that somebody who snitches on somebody else shall reap the fit punishment.”
From the Los Angeles Times Nov. 26, 2014:
This witness was scared. He had Googled himself and found the phrase: “Snitches get stitches.”
He was scared that black neighbors would find fault with his description of what happened when a white police officer, Darren Wilson, shot dead an unarmed black man, Michael Brown, in Ferguson, Mo.
He was scared that white supremacists would accuse him of hurting Wilson’s case. “I do think of the Ku Klux Klan. I do,” he told investigators.
From the first day a grand jury met, it is clear that fear and anxiety played major roles in the struggle to paint a precise picture of what unfolded between Wilson and Brown on Aug. 9.
According to the news: “Snitches Get Stitches” message spray painted on burned-out QuikTrip
Some of my Jewish friends laughed at this black mentality of not informing on another black, but it is a time-honored practice (mesirah) among Jews to not inform to Gentile authorities about a Jew.
Tribes, be they black, Jewish or Chinese, have a different relationship to the nation state from goyim. They will frequently place the well-being of their fellow tribesmen before the law of the land. It might make sense for a nation to racially profile and to consider ethnicity, race and religion when governing and enforcing the law with its people, giving more scrutiny to certain minorities in certain instances according to their statistical predilections.