Now-defunct socialist newspaper (NOT an organisation) run during the 1980s by the Socialist Campaign for a Labour Victory (SCLV). Neither the paper nor SCLV exists at present, both having been dissolved in the late 80s.
This does not stop the rightwing in NUS treating Socialist Organiser (aka "S.O.") as the secret conspiracy behind every setback and every instance of opposition they face. The supposed organisation is supposed to have covert arrangements to produce such outcomes, and every left-leaning campaign, however broad-based, is accused of being a "front" for "S.O.". Basically, the NUS rightwing's pet version of Illuminati, cabal or ZOG.
Also known as 'the trots'.
Socialist Organiser was never what the NUS rightwing now claim it is, and in any case it's been defunct for 20 years. Get over it, you wankers!