HEY! Check another idiom. To have a screw loose. It means to be crazy. Lena didn't take a jacket even though it was cold and windy outside. She must have a screw loose. Лена не взяла куртку, хотя снаружи было холодно и ветрено. Она , должно быть, "ослабила винт". Have you ever had a screw loose? Comment down below your story with this idiom.