Body parts
Colours
Animals
Weather
Food
100

To have your head in the clouds

Lost in thought. Daydreaming. Not in reality.

100

Feeling blue

Feeling sad

100

Let the cat out of the bag

Tell a secret

100
To feel under the weather

To feel sick

100

Piece of cake

Really easy

200

Put your foot in it.

Make a mistake. Say or do something embarrassing

200

See red

To be angry

200

Hold your horses

Slow down! Don't be in a hurry
200

It's a breeze!

It's easy!

200

Walk on eggshells

Be careful with your actions and words

300

Cost an arm and a leg

Really expensive

300

Have a green thumb

Be good at gardening

300
To have butterflies in your stomach

You feel nervous

300

As right as rain

To be healthy

300

Spill the beans

Tell a secret

400

I'm pulling your  leg

I'm joking

400

In the red

You owe money. To have debts

400

In the dog house

In trouble

400
Throw caution to the wind

To do something without worrying about it

400

Big cheese

Very important person