Abbreviation which stands for colors Red, Black and Green, the Pan-African and Black Liberation Flag.

This flag was adopted by the members of the Universal Negro Improvement Association and African Communities League (UNIA) at their convention held in Madison Square Garden on August 13, 1920.

The three colors represent:

red: the blood that unites all people of African ancestry, and shed for liberation;
black: black people whose existence as a nation, though not a nation-state, is affirmed by the existence of the flag; and
green: the abundant natural wealth of Africa.

Info taken from Wikipedia.
First of all, RBG means RED BLACK AND GREEN and you gotta know it!
by 2JB August 29, 2006
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A gang that stands for Revolutionary But Gangsta.
He is in RBG.
by SLEKA49ER March 1, 2009
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damn did you see those sexy girls in the car with the giant red bull can on top! i love the RBGs!
by sugarnspice! April 13, 2011
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stands for Random Black Guy
the term used by a white girl who's attracted to black guys. Refers to her interests as RBGs. Usually the girl has a tendency to think every black guy who passes her is hott.
Damn, look at all these fine RBG's.
by starwarsjediyoda June 21, 2005
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"revolutionary but gangsta"
coined by dead prez to refer to an enlightened, politically active young african american man lives the thug life yet is committed to a greater political cause.
shit, that negro is rbg - i seen him reading trotsky while he was cleanign his nine.
by MC Sokrates March 20, 2004
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A unit of measurement to connote the display of bravery, courage, and strength in the face of likely opposition or criticism; derived from the bravery, courage, and strength exhibited by the late Justice Ruth Bader Ginsburg a.k.a. the Notorious RBG.

Used especially (but not exclusively) in relation to issues of equality.

Used colloquially and typically in place of the word "balls" in a sentence (i.e. "he has a lot of balls doing that" would instead be "he has a lot of RBGs doing that")
"Wow, Dr. Blasey Ford really has a lot of RBGs going up against Brett Kavanaugh"

"Those people fighting to save Clinic 554 really have a lot of RBGs"
by kmurphySJ September 27, 2020
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