to describe exactly what is causing a situation or problem.
hit the nail on the head.
to allow very little time for something.
cut it / things fine.
completely different from each other.
To be (like) chalk and cheese.
to pay too much money for something.
pay through the nose.
Sth you are good at or enjoy doing.
sb's cup of tea
to try to persuade someone to believe something that is not true, as a joke.
pull sb's leg.
To entertain people very successfully, so they laugh or clap for a long time.
bring the house down / bring down the house.
to feel very nervous, usually about something you are going to do.
Get/have butterflies in sb’s stomach
Very rarely.
once in a blue moon
criticisms of or warnings to a particular person that have no effect on that person.
(like) water off a duck's back
Sth is given to you free by a business.
on the house
to become extremely angry.
hit the roof / ceiling = go through the roof
slightly
ill.
(be / feel / look) under the weather
