1 definition by Goldenboy62

Top Definition
1. Any outsider or member of a sub culture that is willing to do anything to be accepted and be identified as mainstream.
2. A member of a sub culture whose natural likes lean toward mainstream tastes.
Dude, I saw Tyrone, the other day at the Ratchet Club chatting up some debutantes. I didn't know he was a mainstreamer.
by Goldenboy62 January 27, 2011
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