Animal Idioms
Time Idioms
Money Idioms
Food Idioms
Health Idioms
100

Hold your horses

Be patient, or wait.

100

Time flies

time passes quickly

100

Blow your money

Spend money quickly and carelessly

100

A piece of cake

easy

100

An apple a day keeps the doctor away

Eating healthy food prevents sickness

200

Chicken out

Decided not to do something because of fear
200

killing time 

doing something while you wait for something else

200

Costs an arm and a leg

Expensive

200

Big cheese

person of influence, boss or best at something

200

A pain in the neck

something/someone that annoys you or is difficult to tolerate

300

Let the cat out of the bag

told a secret

300

better late than never

Doing something late is better than not doing something at all

300

Money doesn't grow on trees

Money is limited and has to be earned

300

Spill the beans

told a secret

300

Under the weather

not feeling well, low spirits

400

Cat got your tongue

Said to someone who won't speak, maybe because shy or shocked

400

In the nick of time

At the last moment/Just before it's too late

400

A run for your money

a close competition

400

Cool as a cucumber

calm, even during stressful situations

400

Back on your feet

recovered from an illness or injury

500

The elephant in the room

an obvious problem everyone is aware of but no one is talking about

500

Call it a day

Stop doing something for the day that remains unfinished

500

Nest egg

Money saved for the future

500

A hard nut to crack

challenging to figure out, difficult to understand

500

On it's last legs

something is in bad condition, will soon be of no use, or broken