To break a leg
to have good luck
to do a job well done
to have fun
To take the plunge
To fall down (from a very high place)
To make a choice (especially between two similar options
To commit to a decision (often one that makes you nervous)
As clear as mud
something obvious
something brown
something confusing
To give the green light
to like something
to prohibit something
to allow something
Once in a blue moon
rarely
never
usually
To pull someone's leg
to make someone happy about something
to make someone uncomfortable or anxious
to fool someone or to joke with someone
To be left in the cold
to be alone
to be excluded
to be freezing
To get cold feet
suddenly change your emotion eg: happy to sad
suddenly change your mind about sth because yo're nervous
to be anxious about something
To ring a bell
Something that sounds familiar
To get attention
Something that makes a lot of noise
To be under the weather
to be sad
to be strong
to be ill
to be on the ball
to be funny
to be alert
to be on top
To skate on thin ice
to not like something you have to do
to do something challeging
to be in a risky situation
To cost an arm and a leg
something expensive
Something cheap
Something of low quality
'A piece of cake' to describe something
very funny
very easy
very sweet
To put your feet up
to be tired
to be clumsy
to relax
To bite a bullet
to do something that makes someone else uncomfortable
to make yourself do something difficult or unpleasant
to do something that makes you nervous
To Speak of the Devil
to have an uncomfortable conversation
the person who were talking about unexpectedly arrives
to talk about a person you don't like.
To beat around the bush
to avoid talking about something
to show disagreement about something
to take a long time to do something