[Idiom] Don't push your luck

[Unregistered]

Good morning sir,

I want the correct meaning of this idom and circumtances it could be used.

 

[Kondorosi]

Do not risk what you already have because you may lose everything.

 

[Linguist__]

As for circumstances it is used in, it is commonly used when someone is requesting too many things from another person:

John: Mary, can you take the rubbish out?
Mary: Sure.
John: and then come and give me a massage before you make dinner?
Mary: Don't push your luck.