OGASMRepeated "O"s used consecutively, usually in the spur of the moment when someone comes to a realization, conclusion, or surprise (not an acronym) Internet » Chat
OGASNOngoing G20 (Group of Twenty Finance Ministers and Central Bank Governors forum) Arrestees Solidarity Network (Australia) Miscellaneous
OGASPOberlin Gilbert and Sullivan Players (Oberlin College, Oberlin, Ohio) Miscellaneous