incobegence
A portmanteau of incompetence and arrogance. Coined by Cheryl Tunt in the tv show Archer.
Archer: "Uh-oh, someone's mad they're not in charge."
Lana: "No. I accept Fabian's decision. I'm choosing to be good at my job and let positive things come."
Archer: "Like Ray getting more chances to kill us with his arrogance and incompetence?"
Cheryl: "Incobegence"!