golden goose

noun
1.
a legendary goose that laid one golden egg a day and was killed by its impatient owner, who wanted all the gold immediately.
Examples from the web for golden goose
  • He was an outsider in his new family but also the golden goose.
British Dictionary definitions for golden goose

golden goose

noun
1.
a goose in folklore that laid a golden egg a day until its greedy owner killed it in an attempt to get all the gold at once
Contemporary definitions for golden goose
noun

a continuous resource, esp. of wealth or profit, but which can disappear if misused