feather one's nest
The phrase "feather one's nest" means to accumulate wealth or seek personal gain, often at the expense of others. It implies the act of greedily amassing resources or advantages for oneself, typically through opportunistic or unethical means.
English is confusing! Why do people say "Pardon my French" when they are speaking English? Because of idioms!
An idiom is a phrase or expression that usually presents a figurative, non-literal meaning attached to the phrase. Does that sound fun? It can be!
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