Which is most important Idioms you use it in English country ?

[Fleur de mort]

Which is most important Idioms you use it in English countries ?
Can you tell me I want to use it with my teacher in my school . Because the Idioms in this page are so long and impossible I can save all list in my head .
http://www.usingenglish.com/reference/idioms/
Thanks .

[Anglika]

I honestly don't think you can actually say one idiom is more important than another. Some are used more often or more commonly. They are very much part of their context.

It's raining cats and dogs is a frequent one.

Maybe others will have their favourites for you.

[Fleur de mort]

There is no hope
OMG
I wished I can get some of important idioms in my language to be a arrogant between another girls .
It's over 1000
thanks Anglika.

[Anglika]

If that's the case, make a list of the ones you like and learn them by heart. You can always test their use on us

[blouen]

I'd like to join Fleur with that. Let's learn idioms.