What does cooked your goose mean?

You cooked your goose...that's the end...finality, you lose. It came from a time when people kept their PRODUCING animals around as long as they could. The goose provides eggs. You kept it until it stopped laying. If you "cooked your goose", you were really desperate and did a desperate thing. You're going to lose if you've "cooked your goose".
cooked (someone's) goose
- to destroy someones future chances or reputation
The woman cooked her goose when she fought against her employer and lost.
This statement simply means that you are done for, caught, the jig is up. You're probably in trouble when this is used.