• An affirmative response; "yes, exactly!" (Australian origin).

  Person A: Isn't that place disgusting?
  
  Person B: Bloody oath!

  by Vaughn, Chicago, IL, USA, Nov 03 1999.

• a strain of marijuana

  by Sharon J., Coeur d'Alene, ID, USA, Dec 01 2005.

• "cool", according to the sixth edition of "UCLA Slang".

  Other terms or phrases include... "obama," meaning cool, as in "You so obama."
  
  -- "U.S. president an entry in latest slang dictionary", Reuters, August 2 2009

  by WalterGR, Sacramento, CA, USA, Aug 04 2009.

• the universal healthcare program in the United States proposed by the Obama administration. Often used pejoratively.

  Obamacare Can't Win an All-In Wager
  
  -- article title, The New York Times, Albert R. Hunt, September 13, 2009

  by WalterGR, Sacramento, CA, USA, Sep 13 2009.

• variation on the word obese. A large, very ugly person.

  That cheese hog is obeast.

  by Sherri D., Pittsburgh, PA, USA, Nov 21 2002.

• "placebo" backwards. Used as the name of a (obviously non-existant) drug.

  Give the patient in bed 3 a prescription for Obecalp and send him out the door.

  by WalterGR, Oct 03 2009.

• To give head.

  This girl can really obey her thirst.

  by Ron, Brooklyn, NY, USA, Feb 14 2000.

• acronym for "or best offer."

  by WalterGR, Aug 11 2009.

adjective

• bizarre, absurd, mind-blowing

  It was obscure as hell when the police officer wiped the corners of his mouth and then sniffed his fingers.

  Keith: "Hey Zach, this potato chip looks like Mick Jagger." Zach: "Wow, Keith, that's obscure."

  by A. R., Columbus, OH, USA, Jul 23 2004.

• Comes from the word obviously, an abbreviated emphasis to say that something is very clear.

  Obvi, he wants you!

  by Jaclyn, Edina, MN, USA, Dec 19 2001.

• Short for obviously.

  She obvi wants me, Dawg.

  by Anonymous, Jan 10 2003.

• Out of Control.

  Your kid is OC.

  by Anita C., Richton Park, IL, USA, Jul 24 1998.

• outa control.

  Aw hella naw, u OC

  by REE, Milwaukee, WI, USA, May 18 2005.

• outta control.

  I know he did not just swear at me! That was OC!

  by Valerie, Wisconsin, USA, Jul 19 2005.

adjective

• abbreviation for "out of control" used generally when someone experiences an adrenaline rush or high and engages in abnormal activities.

  that kid was OC at the party last night

  by Trey, Chicago, IL, USA, Jun 01 2003.

• To use one's hands to grope certain (private) places of one's anatomy.

  I'm so horny today. I need to octopus.

  by Paco, Pawtucket, RI, USA, Apr 02 1998.

• to over do it, exaggerate.

  He ODed when he put a gallon of butter on the bread.

  by Eric, Naples, FL, USA, Oct 08 2001.

• Over Doing It.

  That teacher is O.D. with the hw

  by G.P., New York, NY, USA, Apr 23 2004.

• overdoing it..

  1st person: lets spit in her food.
  
  2nd person: Nah, that's OD.

  by Anonymous, Mar 02 2006.

• acronym for "over dose."

  by WalterGR, Aug 11 2009.

• a very early time in the morning.

  by WalterGR, Oct 03 2009.

noun

• very early in the day.

  I had to get up at o-dark-thirty today to pick up Joe from the airport.

  by Morgan D., Seattle, WA, USA, Aug 30 2003.

adjective

• strange.

  by WalterGR, Sep 09 2009.

noun

• a strange person.

  by WalterGR, Sep 09 2009.

noun

• miscellaneous things.

  by WalterGR, Aug 31 2009.

noun

• Short for "Olde English 800" brand malt liquor. This brand of alcohol has achieved such notoriety in poor urban neighborhoods.

  by Russell L., New York, NY, USA, Sep 16 2004.