Here are some common idiomatic expressions in English.
This is an expression used to praise someone. When you say that someone rocks what you mean is that they are great.
Let your freak flag fly
To let your freak flag fly is to do things that would help others to see your uniqueness.
To cry wolf is to call for help when you don’t need it.
Pull a rabbit out of a hat
To pull a rabbit out of a hat is to do something totally unexpected.
Be a catch
If someone is a catch, they are very desirable.
Let the chips fall where they may
To let the chips fall where they may is to let things happen no matter what the consequences may be.
By the skin of your teeth
If you escape by the skin of your teeth, you escape narrowly. If you win by the skin of your teeth, you only just succeed.
Go the extra mile
To go the extra mile is to make a special effort to do something.
If it is the crunch time, it is that period of time when you have to work really hard because you are extremely close to the deadline.
Get out of hand
When things get out of hand, you lose control of them.