Special Place In Hell, commonly (but not always) used to refer to the place someone will end up when he/she creates confusion by responding with an answer to just one person on an email thread that had a lot of people on it (i.e. "Replying-to-solo")
Oscar: why did no one ever respond about what time the party starts?
Sammy: oh Felix said 10pm, he just responded to me I guess
Oscar: what an asshole!!!! he deserves a SPIH!!
Sammy: Let's kick him out of his own party