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 3, 2011
Get the F shitmug. Guy 1: Why are you so mad today?
Guy 2: I was taking a pleasant shower this morning when afterwards I was forced to take an f*ck you shit.
Guy 2: I was taking a pleasant shower this morning when afterwards I was forced to take an f*ck you shit.
by moneymannick October 18, 2012
Get the f*ck you shitmug.