в одно ухо влетает, а из другого вылетает(Jokingly he added: "I constantly have to lecture Mark Collett about all sorts of things. He is a pig ignorant man. Often it goes in one ear and straight out of the other."bbc.co.uk)
одному Богу известно(Today the usual English expression, "in the lap of the Gods," refers to a situation that one can't control–something controlled by fate, destiny, providence. The phrase "in the lap" is used here to mean in the care, keeping, or control (a figurative sense of "lap" as a place where a child is held).)