Its a type of chord, made with a minor 3rd interval, then another minor 3rd interval on top of that, a B diminished chord would consist of B, D, and F with the interval of B to D being a minor 3rd, and D to F also being a minor 3rd. Additionally the interval of B to F is a tritone or diminished 5th interval, which is were the name comes from.
What about a Miner on Miner?
Quote by AgentWiggles
Thanks, douche.

Quote by SlayingDragons

Ibanez SZ 520QM
Ibanez RG 450DXB
Fender Big Apple Stratocaster
Pod XT Live
Peavey XXX Half Stack
Peavey Bandit 112
and a soul of Rock n' Roll
Quote by sfsknight07
a minor on a minor... at least its still legal. gross. but legal

I lol'd at that.