Somebody can whistle for something
Definition 1 of 1
Pro Tip 1/3Denial Implication
Implies a strong denial or refusal when granting a request or desire. 
He thinks he's getting promoted? He can whistle for it.
Pro Tip 2/3British Usage
Primarily used in British English, may not be understood or used by American speakers. 
She's expecting extra holiday time? She can whistle for it.
Pro Tip 3/3Sarcasm or Mockery
Often expressed with a tone of sarcasm or mockery towards someone's unrealistic expectation. 
He wants a bonus after that mistake? He can whistle for it.