nest egg
US /ˈnest ˌeɡ/
UK /ˈnest ˌeɡ/

1.
养老金, 储蓄, 备用金
a sum of money saved for the future, especially for retirement or a specific purpose
:
•
They're hoping to build up a substantial nest egg for their retirement.
他们希望为退休积累一笔可观的养老金。
•
Her small inheritance became a valuable nest egg for her children's education.
她的小笔遗产成了孩子们教育的宝贵储蓄。