Which idiomatic expressions in English do you use the most? Idioms are important to learn not only because they are often used in everyday speech but also because their meanings may slightly differ from what we would expect them to mean. For example, "not to put all one's eggs in one basket" has nothing to do with eggs and baskets: it basically means "Don't risk everything all at once". So, what are your favorites? or which ones do you use most often?