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Phrase(s): What’s sauce for the goose is sauce for the gander.
Prov. What is good for one person is good for another.; What is good for the man in a couple is good for the woman. • Jane: You’re overweight; you should get more exercise. Alan: But I don’t really have time to exercise. Jane: When I was overweight, you told me to exercise; what’s sauce for the goose is sauce for the gander.
McGrawhill's American Idioms And Phrasal Verbs
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What applies to one applies to both, especially to both male and female. For example, After her husband went off with his fishing buddies for a week, she decided to take a vacation without him? what's sauce for the goose, you know. This proverbial expression, often shortened as in the example, was cited and described as ‘‘a woman's proverb" in John Ray's English Proverbs (1678).
American Heritage Idioms