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