Animals
Furniture
Sports
Food
Parts of the Body
100

Fish out of water

What is to feel uncomfortable in a situation?
100

A watched pot never boils

What is things appear to go more slowly if one waits anxiously for it?

100

Beat someone at their own game

What is to outdo someone using their own methods or tactics?

100

All your eggs in one basket

What is the state of having invested heavily in just one area or devoting all of one's resources to one thing?

100

An arm and a leg

What is a lot of money?

200

A little bird told me

What is to not reveal your source of information?

200

Sweep something under the carpet

What is to hide or ignore something?

200

A whole new ballgame 

What is a completely different situation?

200

Apple of someone's eye

What is said about someone whom you love the most and are very proud of?

200

An eye for an eye

What is to suggest that punishment should equal the crime?

300

Beat a dead horse

What is to continue talking about something that cannot be changed?

300

Turn the tables

What is to change or reverse something dramatically?

300

On the ball

What is to be well informed and respond quickly?
300

Spill the beans

What is to reveal a secret?

300

Easy on the eye

What is to be attractive and pleasant to look at?

400

Curiosity killed the cat

What is to not be too curious and ask too many questions about something because it can get you in trouble?

400

Under the table

What is to do something secretly?

400

It beats me

What is used to suggest that you don't understand something?

400

Walking on eggshells

What is to be overly careful in dealing with a person or situation?

400

Get something off your chest

What is to reveal something that is worrying you or making you feel guilty in order to feel relieved?

500

This idiom means something that will never happen

Hint-this idiom could also be considered personification

What is when pigs fly?

500

This idiom means to dance

Hint-this idiom is not used as often anymore and has to do with something that you goes on the floor

What is to cut a rug?

500

This idiom means to give up on something

Hint-this idiom involves an object you use to dry something off with

What is to throw in the towel?

500

This idiom means to get a job and bring home money earned from this job.

Hint-it has to do with a breakfast food

What is to bring home the bacon?

500

This idiom means to describe a situation or problem exactly. 

Hint-this has to do with a tool you use with a hammer 

What is to hit the nail on the head?