“Feather your own nest” means “to use your position or your job to get a lot of money for yourself”. Example: While the boss feathered his own nest, his company was firing employees by the hundreds. Want to learn English? Choose your topic here:.
“Rub it in” means “to talk about something you know will upset or embarrass someone”. Example: I know I made a silly mistake, but do you have to rub it in by talking about it all the time? Origin: This idiom is a short form of the phrase ‘rub salt in.