easier said than done
be more easily talked about than put into practice
when pigs fly
something will (most likely) never happen
break a leg
good luck
piece of cake
something is very easy
be on the same age
think, know or behave in the same way as someone
sink or swim
a situation in which you will fail if you do not make a lot of effort
kill two birds with one stone
to achieve two things at once
two-faced
not to be trusted
in a nutshell
very briefly, in a short way, giving only the main points
be on cloud nine
extremely happy and excited
hit the hay
snake in the grass
an unpleasant person who cannot be trusted
keep a straight face
to try to stop yourself from smiling or laughing
spill the beans
to tell the secret information
not in a million years
something is extremely unlikely or impossible
kick the tires
to try something or examine it carefully before you buy it
Cat got your tongue?
this is said to someone who would not speak
all ears
someone who listens carefully
the apple doesn't fall far from the tree.
a child usually has a similar character or similar qualities to his or her parents
on thin ice
when somebody does something risky
face the music
to accept responsibility for something you have done
smell a rat
to believe something is wrong
in the blink of an eye
when something happens at a very short time
turning over a new leaf
to start over, to act in a different manner or change your attitude about something
be on the same boat
to be in the same unpleasant situation as other people