Same word as know-nothing:
brainless, dizzy, featherbrained, frivolous, giddy, harebrained, ignorant, illiterate, inane, know-nothing, silly, skittish, stupid, uneducated, unschooled, untaught, vacant, vacuous
brainless, dizzy, featherbrained, frivolous, giddy, harebrained, ignorant, illiterate, inane, know-nothing, silly, skittish, stupid, uneducated, unschooled, untaught, vacant, vacuous