90s gang affiliated rappers called themselves "Original Gangsters" or "OG" for short. It's a title for real, actual crime and gang affiliated gangsters. While a lot of black young men in the 90s called themselves gangsters a lot of them didn't commit any crime of even was a part of a gang. The term Original Gangster is less common today, mostly because the limitations of lyrics today, but Original Gangsters are still a thing.
The mobsters, bootleggers and gangsters of the 1920's and 30's, such as Al Capone, Lucky Luciano, and Bugs Moran. Anyone who claims otherwise are lying out their ass.
The act of pretending to be a tough guy on the internet that wants to "trigger the libs" but wind up looking like a gaping vagina that cries on the internet like a big baby.
See that loser right there? They sure are a big originalgangsta