Weather idioms
Animal idioms
color idioms
temperature idioms
misc idioms
100

Under the weather

sick

100

All bark and no bite

all talk, no action

100

feel blue

sad

100

get cold feet

get nervous
100

cost an arm and a leg

extremely expensive

200

Raining cats and dogs

raining very heavily

200

a little bird told me

I heard something

200

green with envy

jealous

200

lose your cool

get very mad

200

bite the bullet

accept the inevitable

300

break the ice

start to know a new person with conversation

300

the elephant in the room

the obvious thing nobody is talking about

300

green thumb

can grow plants or flowers easily

300

as cool as a cucumber

very calm

300

call it a day

Let's go!

400

calm before the storm

short period of time of peace / tranquility before it gets busy

400

hold your horses

wait, slow down

400

white lie

a little lie

400

to be in hot water

to be in trouble with someone

400

hit the sack

go to sleep

500

on cloud nine

very very happy or excited

500

open a can of worms

create problems or reveal a difficult situation

500

with flying colors

successfully

500

sell like hot cakes

to sell quickly

500

bite the hand that feeds you

hurt the person who is helping you