Fuck it + Stick it (verb) - a passive-aggressive, frustratedexpression (fuck it), projected at someone (stick it). Most likely, said in finality of a situation.
1) Dude, who didn't load the dishwasher again? Ahh fickit! (knowing who it was)
2) I asked you to pick me up at 5:30, it's 6:15. Fickit.