Body Parts
Animals
Food
Weather +
Time and money
100

out of hand 

out of control 

100

the early bird gets the worm 

the first people to get there will get the best stuff


100

It is a piece of cake 

It is easy 
100

Under the weather 

You are sick

100

a dime a dozen

very common 


200

break a leg 

good luck 

200

 let the cat out of the bag

tell a secret 

200
Spill the beans 

To tell the secret or information that you know 

200

Head in the clouds

Not paying attention 

200

better late than never 

it is better to be late than not show up at all

300

cost an arm and a leg

very expensive


300

kill two birds with one stone

to get two things done by doing one thing 

300

Put all of your eggs in one basket 

Taking a risk or doing something risky

300

Rain on someone's parade

to ruin or spoil something 

300

beat the clock 

to finish something before your time is up

400

by the skin of your teeth

just barely 

400

go on a wild goose chase 

to do something pointless 

400

Don't cry over spilt milk

there is no reason to be upset about something that you can't change

400

Once in a blue moon 

Rarely

400

time is money

work quickly

500

wrap your head around it 

to understand something hard 

500
the elephant in the room 

the problem being avoided

500

Comparing apples to oranges

Comparing things that can't be compared because they are too different

500

A perfect storm

the worst thing possible 

500

right on the money

exact or correct