kill the goose that laid the golden egg meaning

• [American slang]
  To spoil something that is good or something that you have, by being greedy. A proverb. Mrs. Jones gives you an apple from her tree whenever you go by her house, but don't kill the goose that laid the golden egg by bothering her too much.
  

• kill the goose that lays the golden egg(s).:    [American slang]Pr ...
• goose egg:    Noun: goose egg&nb ...
• goose-egg:     noun1. The egg of ...

Examples

1. you should remember not to kill the goose that laid the golden egg by asking the boss for more
2. the boss has raised your salary, but remember not to kill the goose that laid the golden egg by asking him for more
3. But we'd kill the goose that laid the golden egg ."
4. The current Congress seems determined to kill the goose that laid the golden egg of American democracy.
5. I just hope we don't kill the goose that laid the golden egg ."