Shitcum is what one does when in a state of extreme anger or rage; to shitcum in ones mouth is the ultimate act of disrespect. To do it requires a largewill and steadfast self-discipline. The shit must be followed by the cum after no more that 3 seconds. While shitcum is normally placed in the mouth, it can be deployed anywhere on the body.
Chris: Dude, your girlfriend cheated on you? How’d you handle it?
the penis is removed from vigourous vagina penetration and inserted into the oral cavity and ejaculation ensues, followed by a swift blow to the throat, causing the recipiant to spit up the oral contents.
mary: if you behave yourself at the christmas party i will let you perform a spitnum!
henry: this is shaping up to be the best christmas ever!
B: While seated, performing a genital outpouring while watching a (preferably) pornographic movie.
A: Have you seen lay the kat's new sitcum? It's suckdickulous
B: Goodness gracious, that acting, so much espirit, sans effete, naturally I sitcame on my monitor.