While we were extolling the praises of the Green River show at SP20 tonight, we (imaginary stella and I) debated over whether the band could actually be called a "supergroup" as that name is normally reserved for bands made up of stars of other great bands.
We decided that a more appropriate term for Green River is "reverse supergroup" as it was a minor band that spawned several other major bands.
Put that in your rock lexicon and smoke it.
PS – Can we think of any other reverse supergroups? Or is there already a term for this that we just don't know?