Rain cats and dogs 
          : Rain very hard

Read between the lines
          : Try to understand the true meaning inside

Read someone's mind
          : Try to understand someone's thought

Run against someone
          : Compete with someone

Run behind
          : Delay / slower than schedule

Raise a stink
          : Protest in an aggresive way

Rat race
          : Dirty and unfair competition

Racking my brain
          : Try so hard to remember or think of something

Run out of
          : All gone. No more left.