Definition of "OMC"

OMC

noun
plural OMCs
1. (fandom slang) A male original character.
  Quotations
  OTOH, if an OFC or OMC is written to further the story, well, if you can make me believe it, congratulations.
  1999 September 28, Sigrid H., “NEW: Wonder Of Wonders/speechification/Laura/Karmen”, in alt.startrek.creative.erotica.moderated‎ (Usenet)
  It involves archaeology, the mysterious death of an immortal and the development of a menage a trois between Mac, Methos and a very well developed OMC.
  2000 January 2, Shomeret, “My Favorite HL Fics of 1999”, in alt.tv.highlander.creative‎ (Usenet)
  However, especially in the Romeo and Juliet cases, they go all fan-wanky and the stories don't have the effectiveness because you recognize them as simply efforts to make a way to keep R & J alive if not happy together (often by the introduction of an OFC or OMC to replace the other character in another's life).
  2004 August 8, Jillun, “Re: What ratings are acceptible[sic] here?”, in alt.tv.buffy-v-slayer.creative‎ (Usenet)