The phrase "cook someone's goose" means to ruin someone's chance or plan. The antonyms for this phrase could be "help someone's cause", "make things better", or "give someone an advantage". Instead of cooking someone's goose, you can try to support their efforts, provide assistance, or offer encouragement. By being kind and considerate, you can improve someone's situation and help them achieve their goals. So, next time you are tempted to cook someone's goose, think of the antonyms and choose to lend a helping hand instead!