Native speakers of any language use quite a lot of idiomatic expressions without thinking. However, when you are learning a foreign language it is one of many stumbling blocks. Let's sort them out!

Off the hook - to free smb from an obligation To make a mountain out of the molehill - to make a big issue out of a small issue Barefaced - being deliberately bold and shameless - to lie without any embarrassment To pull smth out of the hat - To produce smth unexpectedly - by surprise - and solve a problem - to imagine things that are not true In the blink of an eye - Very fast