"Internet Slang" acronyms and abbreviations > O

O: Opponent 
O: Over 
O: Surprised 
O RLY: Oh Really 
O&O: Over and Out 
O): Clown nose smiley face 
O/P: Out of print 
OA: Online auctions 
OA: Over acting 
OAO: Over And Out 
OAOO: One And Only One 
OAR: On a roll 
OASrN: On a site right now 
OATUS: On A Totally Unrelated Subject 
OAUS: On A Unrelated Subject 
OAUS: On An Unrelated Subject 
OB: Obligatory 
OB: Oh Baby 
OB: Oh brother 
OBE: Overcome By Events 
OBEX: Object Exchange 
OBKB: Okay, bye bye 
OBO: or best offer 
OBTW: Oh, by the way 
OBTWIAU: Oh by the way I adore you 
OBTWIAVBP: OBligatory The World Is A Very Big Place 
OBX: Old Battle Axe 
OC: Of course 
OC: Original Character 
OC: Own Character 
OCD: Obsessive Compulsive Disorder 
OCIA: Of Course I Am 
OD: Oh Dear 
ODL: Oh Dear Lord 
ODTAA: One Damn Thing After Another 
of: Old Fart 
OFC: Of course 
OFL: Out for lunch 
OFN: Old Freaking News 
OFS: One Finger Salute