Non-mainstream Edit Meaning

1.

the opposite of mainstream. usually not the 'trend' and usually not what everybody else is doing. original and individual. can usually be identified as something original and/or something that will probably never become popular, but awesome nevertheless.

mainstream : conformists :: non-mainstream : individuals.

SOMETIMES alternative/emo/indie music. other music, such as pop punk, can be mistaken as non-mainstream.

See ruth