big sittin' chief asshole

A dumbass who thinks he has the best ideas while in reality the ideas that person have are always troublesome. It can also mean "reckless" or a "psychopath"

Lamar: "Nigga that's the Apache blood in me homie. You lucky i ain't do a flying tomahawk and scalp they motherfuckin' ass.
Franklin: "We can't repo the assets of a dead man, big sittin' chief asshole!"