Animal Idioms
Outdoor Idioms
Food Idioms
Body Parts Idioms
Combo Idioms
100

Raining cats and dogs

Raining very hard 

100

High as a kite

high up in the sky

100

Piece of cake

easy 

100
All ears

listening

100

Hit the hay

Go to bed 

200

Cry wolf

false alarm 

200

On the fence

undecided 

200

Baker's dozen

13

200
Break a leg 

good luck

200

New York Minute

very fast 

300

High on the hog

living luxuriously 

300

Between a rock and a hard place

tough situation

300

Cry over spilled milk

whine/complain about something long ago

300

Bite your tongue

Be quiet 

300

Dropping like flies

large number of people dropping out/cancelling
400

A leopard can't change his spots.

You can't change who are you. 
400

Dog days of summer 

Hottest days in summer 

400

Greatest thing since sliced bread

great idea 

400

Cast iron stomach

a strong stomach; can eat/drink anything

400

Head over heels

excited or in love 

500

Like a chicken with his head cut off

acting in a frenzy or acting wild  

500

Field day

enjoyable time 

500

Apple of my eye

someone very special 

500

Put your foot in your mouth

say something embarrasing

500

Icing on the cake

When you have something good, and you get something even better