Derived from the word incest. Bandcest relates to bands whose members are overtly friendly and/or sexually active with other members within their own musical group.
This word was developed, but not restricted, to describe the sexual relationship (slash) between all male members of a band.
An example of bandcest can be found by observing the relationship in bands such as Placebo or Fleetwood Mac.
the phenomenon occurring in both high school and college marching bands.
Members of the band date only other members, around and around in a bizarre and incestuous love polygon.
This occurs primarily because band kids have no time outside of band to find a significant other, so they just date within the band.
Katie - "Did you hear? Mark and Tiffany are going out now."
Danielle - "Weren't you going out with Mark?"
Katie - "Not anymore. Still...it's totally bandcest."