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1.
The beliefs held by an individual who credits the existence of God(s) or a higher power, but does not subscribe to the specific religious beliefs held by any particular faith or institutionalized religion.
John: I don't go to church, I don't pray, and I'm not religious, but I believe in some kind of a higher power. Is there a name for that?

Steve: Yeah, it's called 'somethingism.'
by Nefftyda August 20, 2008
 
2.
A term first (and probably, only ever) used on the popular tv show "Buffy the Vampire Slayer" in ep. 19 of the third season ("Choices"). Can be used to point out obvious discrimination that doesn't quite fit any specific "-ism".
"How dare you cut me out of the joint because I have Hep C. That's... something-ism..."
by J. Francesco August 25, 2007