OG 

Stands for "Original Gangster" Nicole and Alex are the Original Gangstas since 1980.

DAMN Look at that, it's straight OG style, Nicole and Alex style.

OG by LAreinaNicole December 30, 2010

OG 

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.

OG by Don Knotts version 2.0 July 1, 2008

OG 

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.

OG by MeleKalikimaka July 30, 2012

OG 

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!

OG by poopismylife June 11, 2011

og 

Short for Original...until Ice T made a song titled "Original Gangster" in the 80's which changed the meaning of OG

Oh Shit..thats helluh OG right there.!

og by Mylene April 30, 2005

OG 

Olive Garden. Mafia owned.

Those OG breadsticks rock my world orgasmically.

OG by emHOly July 25, 2008

OG 

A PERSON WHO CAME UP FROM THE HARD TIMES A REAL SOLID PERSON, ALWAYS THREW A MIDDLE FINGER BACK AT LIFE, (WHO IS BY THE WAY A STRAIGHT UP BITCH....) AND CAME OUT CLEAN AS DOWNY. LIVED A LIFE OF CRIME, TRUE, TO WHATEVER THEY DID, DONE AND SPOKE. YOU MAY HATE THEM YOU, MAY LOVE THEM. THEY COME IN ALL SHAPES AND SIZES AND ALL COLORS. TODAY, THERE ARE ALMOST NOTHING BUT WANNABE'S, SELL-OUTS, FAKES, GOLD DIGGERS, LIARS, COWARDS AND PLASTIC SEE THROUGH PUSSIES.

* THE LAST OF A DYING BREED*

"OG" ORIGINAL CHIEFTAN WARRIORS FROM THE 1900'S AND FAR ON BACK BEFORE THE THOUGHT OF CHRIST -ALSO - MEXICAN SAVIOR AND WAR HEREO OF ALL MEXICANOS, ZAPATA VILLA - A GREAT LEADER IN THE EAST ATILLA THE HUN -

OG by ANNONYMOUS ONE October 26, 2009