Starting around 1990, roughly concurrent with the release of Spike Lee's seminal motion picture "MALCOLM X" and the dizzying successes of rap music stars, a t-shirt slogan started to appear which said; IT'S A BLACK THANG, Y'ALL, YOU WOULDN'T UNDERSTAND.

The word "thang", used in this context, was an Ebonicism used to refer specifically to a cultural meme or norm, which those who belonged to the special group-- in this case, African-Americans, would immediately recognize and understand... whilst those not belonging to this group (whites or non-blacks) would fail to understand, appreciate, or even recognize.

Thus, by extension, a "thang" is a folkway, meme, norm, predilection, code, shibboleth, artifact or behaviour exclusive to, or closely allied with, a particular sub-group of the larger populace.
Upon entering a neighborhood bar traditionally frequented by the African-American community:

White wannabe-rapper: "Yo, what is up widdis? One jar at the end of the bar filled with pickled eggs and another one filled with pickled pig's feet? Yo, dass nasty!""

His Black buddy: "Man, it's a Black thang, you wouldn't understand."

Or, during a moment of treasured understanding:

Straight guy: "Would you mind please telling me what IS it with you gays and Barbra Streisand?
Gay guy: "Oh, I guess it's a Queer thang, you wouldn't understand."

Or, at a typical American High school:

High School Teacher A: "One of my students actually has a tattoo of a tiny black teardrop under his left eye! It's kinda creepy... What is THAT all about??"
High School Teacher B: "Yeah, well that's a Latino gang-banger thang. Supposedly it means they've offed someone."
by david lincoln brooks August 11, 2007
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A word from BTS song lyrics 'IDOL'
by ntshakhzmn December 3, 2018
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"Now I'm gonna make you dance, get your chance. Yeah boy, shake that thang." (clean version) -Eminem, "Just Lose It"
by Michael Burmeister December 9, 2005
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a slang word for flicking someone or something.
"what are you doin?"
"I'm thanging you, you silly goose!"
by Marjory1234 October 5, 2007
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verb- to hit someone so hard they get knocked out
Cuz, Imma thang him if he keep talking head
by big ang May 3, 2005
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