This wikipedia article has a pretty good list of english idioms, along with their meanings. https://en.wikipedia.org/wiki/List_of_English-language_idioms There are a couple on there that I have never heard but a lot of them are very common so this is a good place to start.

An example would be "Spill the beans". It doesn't literally mean spill beans but figuratively means to tell someone about something private or a secret. There are many we use so if you want to know it's meaning just post it up :)

There are too many. It will be had to list every single one. Best thing is if you see one, just post it here