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Showing results for feather one's nest. Search instead for feather+ones+nest.
Synonyms

feather one's nest

Idioms  
  1. Acquire wealth for oneself, especially by taking advantage of one's position or using the property of others. For example, Bill's many profitable consulting assignments enabled him to feather his nest quite comfortably. This expression alludes to birds making a soft nest for their eggs. [Mid-1500s]