Every Saturday I’ll give you a couple of idioms to learn. An idiom is a saying or phrase whose meaning cannot be taken from the literal meanings of the words.
let sleeping dogs lie: don’t make trouble if you don’t have to
Example:
I know you’re tempted to step in and bail your son out, but it’s best to let sleeping dogs lie. He’ll have to learn the hard way.
let the cat out of the bag: tell something that is supposed to be a secret
Example:
Bob and Mary weren’t planning on telling anyone yet that they were going to have another child, but their son let the cat out of the bag.