feather your own nest
US /ˈfɛðər jʊər oʊn nɛst/
UK /ˈfɛðər jʊər oʊn nɛst/

1.
中饱私囊, 为自己谋利
to use your position or job to get money or other advantages for yourself, especially in a dishonest or unfair way
:
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The politician was accused of feathering his own nest by awarding contracts to his friends.
这位政客被指控通过将合同授予朋友来中饱私囊。
•
She was fired for trying to feather her own nest at the company's expense.
她因试图以公司为代价中饱私囊而被解雇。