She truly is an idiot.
idiot: noun
One deficient in judgment and good sense: ass, fool, imbecile, jackass, mooncalf, moron, nincompoop, ninny, nitwit, simple, simpleton, softhead, tomfool. Informal dope, gander, goose. Slang cretin, ding-dong, dip, goof, jerk, nerd, schmo, schmuck, turkey.
Oh! You mean...that jackass?