The combination of
something being obscene and insane at the same time.
Obscene can represant the amount of
money spent. "That's an obscene amount of
money spent for the building of that hotel"
Insane can represant someone not of sound mind. "Hillary hit Josh in the kneecap, that's so insane."
Hiram- "Hey man, the amount of dough you gave that chick for her strip
tease was way too much. She didn't even show her
tits."
"
Yeah, I know, it's so obsane. I should have asked for some nipple"