Idioms 1
Idioms 2
Idioms 3
100

Under the weather

Feeling ill/getting sick

100

Worth its weight in gold

Highly valuable

100

Spill the beans

Share a secret

200

Bite the bullet

Finish something/ Get something over with

200

Cost an arm and a leg

Very expensive

200

Get the show on the road

Start something or begin

300

Call it a day

Stop doing something

300

On top of the world

Extremely happy
300

Break a leg

Good luck

400

Leave no stone untured

Look everywhere 

400

Like two peas in a pod

Be together always

400

The ship has sailed

It is too late
500

Cup of tea

Not something one likes

500

Hit the nail on the head

Doing something the exact way in which it should be done

500

On thin ice

Sensitive situation/ person