When pigs fly : something that will never happen.
As cool as a cucumber: calm and relaxed (especially in a difficult or stressful situation).
Hold your horses: ۱) slow down; 2) wait a moment; 3) be patient.
“It’s raining cats and dogs”: when there is a heavy downpour. It simply means “a heavy rain.”
Cat got your tongue: an expression that is used when someone is quiet and isn’t talking or responding when you expect them to.
Egg on face: you look stupid because of something that you have done
or to be very embarrassed because of something you said or did
Straight from the horse’s mouth: directly hear it from the person who has direct personal knowledge of it
Speak of the devil: this expression is used when a person being spoken about unexpectedly arrives
A Piece of cake:something that is very easy to do
Race against the clock:a situation in which something has to be done very quickly
Head in the clouds:to be day dream and not paying attention to what is happening or being said