Fucking Idiot put together
Used when someone just says something so stupid, and you can't even be bothered pronouncing the full two words.
Fucking + Idiot = Fuckiot
Dude 1: How many cops does it take to screw in a light bulb?
Dude 2: How many?
Dude 1: None. It turned itself in.
Dude 2:...........Your'e a Fuckiot