Hold your horses
Be patient, or wait.
Time flies
time passes quickly
Blow your money
Spend money quickly and carelessly
A piece of cake
easy
An apple a day keeps the doctor away
Eating healthy food prevents sickness
Chicken out
killing time
doing something while you wait for something else
Costs an arm and a leg
Expensive
Big cheese
person of influence, boss or best at something
A pain in the neck
something/someone that annoys you or is difficult to tolerate
Let the cat out of the bag
told a secret
better late than never
Doing something late is better than not doing something at all
Money doesn't grow on trees
Money is limited and has to be earned
Spill the beans
told a secret
Under the weather
not feeling well, low spirits
Cat got your tongue
Said to someone who won't speak, maybe because shy or shocked
In the nick of time
At the last moment/Just before it's too late
A run for your money
a close competition
Cool as a cucumber
calm, even during stressful situations
Back on your feet
recovered from an illness or injury
The elephant in the room
an obvious problem everyone is aware of but no one is talking about
Call it a day
Stop doing something for the day that remains unfinished
Nest egg
Money saved for the future
A hard nut to crack
challenging to figure out, difficult to understand
On it's last legs
something is in bad condition, will soon be of no use, or broken