an O.G. is a Orginal (old) Gangsta who let all tha up an comin G's kno whass Poppin an how ta keep they Pimp Hands Way Strong
Young Gangsta: Aye mista O.G. i we's boutsta shoot deese niggas up kuz they talkin shit how should we approach em'

O.G.: aye youngn no need fo guns go ova there an give em an oll fashinon ass whoopin but bring some heat juss enkase sumone try an pull sumthin...

Young Gangsta: aiiite den thank O.G.
by Bigg E-Z August 10, 2003
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adjective meaning "Over Gold"

Taken from the movie "I'm Gonna Git You Sucka" - a 1988 film spoof by (and starring) Keenen Ivory Wayans.

Jack Spade (Keenen) returns from the Army to his old neighborhood following the death of his brother, Junebug. The police determine Junebug's death to be the result of an "O.G.", or "Over Gold" — the victim has overdosed on gold chains.
(excerpt from the movie - set at a crime scene)

Lieutenant: "So, what do you got for me?"

Officer: "John Doe, between 25 and 30 years of age, cause of death looks like "O.G.""

Lieutenant: "Over Gold!"

Officer: "Yep"

Lieutenant: "Any signs of foul play around here?"

Officer: "No sir, looks like a case of just too many gold chains"
by frostboy74 September 15, 2009
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Acea situație în care un bărbat se trezește dimineața cu penisul erect și este nevoit să îl întindă pe crac.
Ieri dimineață am vrut să îmi beau cafeaua dar am avut un O.G.
by ion21 May 18, 2016
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Original Gamer - someone who's been in the gaming industry ever since the dawn of Atari and Nintendo.

anyone who owns an old school game system, such as a Sega Genisis or an NES.
dude, Bob is such an O.G. He has Turbo Graffix games, Magnavox Odyssey, and a Super Famicom imported from Japan!
by El Juegon66 August 6, 2007
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ORIGINAL GENERATION.
a name for early (early 1980s) pioneers in funkstyles (popping, locking).

not, and should never be, orginal gangster.
O.G. =

Disco Dave, Shabba-doo, Pop 'n' Taco, Boogaloo Shrimp, Boogaloo Sam, Poppin' Pete, Mr. Wiggles, Anna Sanchez, Sugapop, Jazzy J, Sally Sly, Cambellock, Skeeter Rabbit, Mop Top, Slick dogg, Dolla Bill, Jeffrey Daniels, etc.
by back to basics April 10, 2006
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1.Abbreviation for the pseudonym 'Opera Ghost,' as used in the novel "The Phantom of the Opera."

2. Abbreviation for the tag name 'Original Gangster.'
1. 'Your obediant servant, O.G.'

2. Jamal is a true O.G., he fucked up some people in his day.
by Polythene Pam November 6, 2003
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O.G., original gangster (pronounced "oh gee")

An O.G. is a senior gang member who has been in that gang since way back in the day and lived to tell the tale.
These kids act like they're O.G., but they're just punks, kids playing gangster.
by major_ September 1, 2008
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