"Baka" means "Idiot" in japanese. It's a very common term that japanese animation companies use alot. Ask for "Okame", it's a Depiction of an ugly face, or the mask of that face. And it's not a goddess or a god (I think).
And "onigami" is japanse for "Angry Spirit" or "Demon spirit"
Normally, "Oni" is japanese for the word "Demon". Like the character "Naraku" (which is Japanese for "Hell (or underworld))" on "Inuyasha (Jap. for "Dog Devil")". Naraku's name use to be "Onigumo" which is japanese for "Demon Spider" (Oni (Demon) and Gumo (Spider))
And "Kami" means "Spirit" by itself.