Terms for subject American

English	Russian
for those not in the know	для непосвящённых (в суть дела/вопроса: for those not in the know, Edge is Microsoft's brand new browser Val_Ships)
not in the know	"не в курсе" ($nakeeye)
not in the know	непосвящённый (colloq. (someone not in the know of...) $nakeeye)
not in the least	никоим образом (Doesn't it bother you? Not in the least. Val_Ships)
not the sharpest knife in the drawer	не отличающийся особым умом (he's not the sharpest knife in the drawer, but he knew she wasn't lying Val_Ships)
not to know enough to come in out of the rain	не отличаться смекалкой
not to know enough to come in out of the rain	плохо соображать
not to know enough to come in out of the rain	быть тупицей