1
2
3
4
5
100

reveal a secret

Let the cat out of the bag

100

cost an arm and a leg

 price is too high

100

can't remember

draw a blank

100

cry crocodile tears

pretend to be upset

100

busy as a bee

working really hard

200

back to square one

start over

200

when pigs fly

something that will never happen

200

be in trouble

in hot water

200

doggy bag

a sack to take home leftovers

200

bad egg

not a good person

300

piece of cake

something easy to accomplish

300

hold your horses

be patient

300

the best

second to none

300

night owl

someone who stays up late

300

barking up the wrong tree

to be mistaken

400

green with envy 

green with envyjealousy 

400

cool as a cucumber

very calm

400
be nervous

get cold feet

400

all ears

listening

400

on cloud 9

very happy

500

head over heals

joyful

500

call it a day

time to quit

500

slipped your mind

forgot

500

under the weather

not feel well

500

raining cats and dogs

raining heavily