vinti çatmır
someone has a screw / a tile loose / someone is a button short / someone has lost a button / someone has a cylinder missing / someone is not all there / someone has got apartments to let / someone has bats in his / her belfry / someone is a bit off (one’s head) / someone is off his / her base / someone is out to lunch / someone is half-cocked / someone is a bit touched / cracked
винтика (винтиков, клёпки, клёпок, заклёпки, заклёпок) не хватает (не достаёт) в голове у кого-либо / гайка соскочила с резьбы