acronym,abreviation

O&O	Over and Out
O RLY	Oh, Really?
O-O	Shock
O.O	Wide eyed
O/	High Five
O7	Salute
O:)	Innocent, angelic
O:-)	Innocent, angelic
OA	Over Acting Over Achiever
OAN	On Another Note
OAO	Over And Out
OAP	Old Age Pensioner
OATUS	On A Totally Unrelated Subject
OAUS	On An Unrelated Subject
OBE	Overcome By Events Out of Body Experience Order of the British Empire
OBGYN	Gynecologist (OBstetrics and GYNecology)
OBHF	Old Bald Headed Fart
OBO	Or Best Offer
OBS	Obviously
OBTW	Oh, By The Way.
OBV	Obviously
OBVI	Obviously
OBVS	Obviously
OC	Of Course Original Character Orange County
OCD	Obsessive Compulsive Disorder
OCO	Oh, Come On
OD	Overdose Over Doing it
ODG	Oh Dear God
ODST	Orbital Drop Shock Trooper (Gaming)
OE	Outlook Express Operator Error
OEM	Original Equipment Manufacurer
OF	Old Fart
OFC	Of Course
OFH	Old Folks' Home
OFT	Often Oh, F*** That
OG	Original Gangster Old Git
OGIM	Oh God It's Monday
OH	Other Half
OHAC	Own House And Car
OHAI	Oh, Hi
OHN	Oh Hell, No!
OHT	One Handed Typing
OI	Hey
OIC	Oh, I See
OIK	Unpleasant, unpopular person
OIY	Hey
OJ	Only Joking
OJD	Obsessive Jonas (Brothers) Disorder
OJT	On Job Training
OK	Only Kidding
OKEY DOKEY	OK
OKI	Okey Dokey, OK
OKIES	Okay
OKW/E	OK What-Ever
OL	Online Office Lady
OLD BAG	Grumpy old woamn
OLDFAG	Long established member of an online community
OLED	Organic Light-Emitting Diode
OM	Old Man
OM NOM	Sound of eating
OMB	On My Break
OMD	Oh My Days
OMDB	Over My Dead Body
OMDZ	Oh My Dayz
OMF	Oh my F*** Misspelling of OMG
OMFG	Oh My F****ing Gosh
OMG	Oh My God
OMGD	Oh My God Dude
OMGNA	O MMY GOSH NOT AGAIN
OMGSH	Oh My Gosh
OMGWTFBBQ	Oh My God, What The Fuck, Barbeque
OMJ	Oh My Jonas (JB)
OMJC	Oh My Jesus Christ
OML	Oh My Lord
OMO	Odd Man Out Homosexual
OMS	Oh My Science
OMSJ	Oh My Sweet Jesus!
OMW	On My Way
OMWH	On My Way Home
OMZ	Oh My Zeus
ON	Drunk, high
ON9	Stupid (Chinese) Online
ONE	One Love, goodbye
ONG	Misspelling of OMG
ONL	Online
ONNA	Oh No, Not Again
ONNTA	Oh No, Not This Again
ONO	Or Nearest Offer
ONOZ	Oh No
ONS	One Night Stand
ONTD	Oh No They Didn't
ONYD	Oh No You Didn't
OO	Object Orientated Suprised
OOAK	One Of A Kind
OOC	Out Of Control/Character/Context
OOF	Out Of Office
OOFT	Sound made when impressed by something
OOI	Out Of Interest
OOM	Out of Mana (MMORPG)
OOML	Out Of My League
OOO	Out Of Office
OOP	Out Of Place
OOPS	Word said after doing something wrong
OOS	Out Of Style
OOT	Out Of Town
OOTB	Out Of The Box
OOTC	Obligatory On-Topic Comment
OOTO	Out Of The Office
OP	Original Poster
OPB	Other People's Business
OPEC	Organization of the Petroleum Exporting Countries
OPK	Other People's Kids
OPM	Other People's Money
OPPS	Misspelling of Oops
OPS	Oops
ORG	Online Reality Games Organization
ORITE	Alright, hello
ORKUT	Google's social network
ORLY	Oh Really
ORN	Oh Really Now
OS	Operating system
OSM	Awesome
OSSIM	Awesome
OST	Original Sound Track
OT	Off Topic
OTAY	Okay
OTB	Off The boat
OTC	Over The Counter
OTD	On The Dot Out The Door
OTE	Over The Edge
OTF	Off Topic Forum
OTFL	On The Floor Laughing
OTK	Over The Knee
OTL	Out To Lunch
OTM	Of The Moment One Track Mind
OTOH	On The Other Hand
OTOOH	On The Other Other Hand
OTP	One True Pairing
OTR	On The Run
OTS	On The Side
OTT	Over The Top
OTTH	On The Third Hand
OTTOMH	Off The Top Of My Head
OTW	On The Way
OTW	On The Whole
OTY	Over To You
OUCH	Interjection said when experiencing pain
OUTTA	Out Of
OVA	Original Video Animation
OVNO	Or Very Near Offer
OVO	Obviously
OWNED	Dominated
OWNM	Oh Well, Never Mind
OWO	Oral Without (condom)
OWT	Anything
OWTTE	Or Words To That Effect
OX	Sharp blade
OY	Oh Yeah
OYE	Listen up
OYG	Oh Your God
OYO	On Your Own
OZ	Australia Ounce
O_O	Confused