Idioms
It costs an arm and leg
Very expensive
Break a leg
Good luck
A piece of cake
very easy
On cloud nine
Very happy
Bring home the bacon
Once in a blue moon
Very rare, rarely
Bookworm
Someone who reads a lot
Learn by heart
A couch potato
A lazy person who watches too much television
Lighting fast
Extremely fast
Money does not grow on trees
It is not easy to get money
Pull yourself together
Calm down and focus on
Get the green light
To get a permission to do sth
Feeling under the weather
To feel mildly ill or sick
To pass with flying colours
To pass sth with a high score
Two peas in a pod
Nearly, identical , very similar
Kill two birds with one stone
To solve two problems with one action
Raining cats and dogs
Raining very heavily
Look like a million bucks
To look and feek fantastic
Have bigger fish to fry
Have more important things to do
Rome was not built in a day
It takes a long time to do sth worth doing
Let the cat out of the bag
A secret that was supposed to be kept quiet that was told
Head in the clouds
Have unrealistic or impractical ideas
The grass is greener on the other side
People think that they will be happier if things were different
Put your money where you mouth it
To do sth rather than just to talk about it