When you want to say "fuck" and "shit" at the same time. Also useful if your parents/peers don't like you saying fuck.
Fshit, I keep stuffing this up!
by TurboPhoenix June 14, 2008
N/tr.v Mix of fuck and shit. Put together, it means to shit on someone in a vigorous, quick, and lively way with sexual intents (usually forced) and is considered sexual harassement.
Don't fshit me.
by Raping Richy-Rich May 02, 2009
it is a shorter way to say fucking shit. For example you say F shit when you are excited OR have a sudden epiphany.
by blaHHH!<3 January 02, 2011