This
database is a comprehensive collection of all the American idioms and slang available.
American Idioms are many and varied. We hope you enjoy our collection. We are adding more all the time.
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give help, give advice without being askedWe were doing very well until our supervisor came along and put in his oar. We would have done better without him.
you cannot change someone's basic human nature or bad qualities
The manager wrote a letter of apology to the customer but a leopard can't change its spots and I do not believe that the manager has changed and the letter does not mean anything.