whistle for it

whistle for it and whistle for the wind

Used as a catchphrase: "You can whistle for it" means "I won't give it to you" or "You won't get it" . A person who whistles for the wind is hoping for the impossible.

Держи карман шире!
Ищи ветра в поле!
The origin is an ancient superstition or saying among seamen that the wind could be brought to a becalmed sailing-ship by whistling for it, as if the wind would blow in sympathy with a mariner's 'blowing'