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the original gangsterz from the hood way back.
NOT GAME, 50 CENT OR G-UNIT.

OG is refering to the pioneers of gangster rap who were in it since the beginning such as Dr Dre, Ice Cube and the late Eazy-E (RIP)
"I stab it like a true no good nigga
should,I do it the way a down OG nigga would" - Eazy E; "still a nigga"
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Older Girl. Similar to LG: little girl. but if you are a little boy and you are going out with and older girl
Dude, are you going out with an OG? niceeeee!
by poopismylife May 17, 2011
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1. An Original Gangster that has been around a long time. An old school gangster, often with lots of experience and lessons learned.

2. In music lingo, OG means, an Original Version of a song that was recorded. Ergo, based on the the Master version. Often times confused with an OG Vibe track.
1.

P1:Who does that guy think he is? he has turned soft. This is our time to shine we taking over.

P2: Give that dude some respect, he is an OG, you can learn a lot from him if you listen and learn. Don't become another statistic.

2.

P1: Yes!! I finally found the OG version to this song all these producers keep screwing up.

P2: Nice, let me get that on my ipod.
by Don NY631 September 12, 2009
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ORIGINAL GINGER

The one in the family who actually has red hair, not a brownish strawberry blonde like the others in the family.
William was the OG in his family and proud of it, unlike his brother Kevin who denied he was a Jin in any sort of way.
by MeleKalikimaka July 30, 2012
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Onscreen Goddess
Person who has attained a high-level of achievement in Powerpoint 2007 presentation creation and development. Typical traits that OGs possess:
-Skilled at climbing terrain maps
-SmartArt obsessed
-Extreme ribbon dexterity
-Spin group temperature wheels as their main form of cardiovascular exercise.
Sheeet! That OG did a TIGHT presentation with some pimped-out SmartArt for the Intro Conference.
by Don Knotts version 2.0 July 10, 2008
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