Common idioms
A piece of cake
It's easy
It cost an arm and a leg
It's expensive
Hold your horses
Wait
Very cosy
On cloud 9
You're happy
Out of the woods
The hardest part is over
Bite off more than you can chew
You accepted something bigger or harder than you could handle
Fast as a cheetah
Very fast
It's raining cats and dogs
It's raining heavily
Hit the nail on the head
Got it perfectly correct
once in a blue moon
It happens once in a while
Hungry as a horse
Very hungry
When pigs fly
It will never happen/is impossible
Quit cold turkey
To quit something suddenly
Rock the boat
Disturb others
Cool as a cucumber
Very calm and relaxed
It's fire
It's cool
Every cloud has a silver lining
There's something good in every bad thing.
A bitter pill to swallow
Something is hard to accept
Stubborn as a mule
He was very stubborn