Very easy
Raining cats and dogs
Raining very heavily/a lot
Let the cat out of the bag
Let a secret out, tell a secret
Green thumb
Someone who is good at gardening or keeping plants alive and healthy
Pitch in
Help out
Couch potato
Someone who is lazy
Feeling under the weather
Not feeling well, feeling sick
Cry wolf
To pretend something is wrong when it really isn't
Out of hand
Out of control, chaos
Home stretch
Almost finished with something
Not my cup of tea
Not something that I like or enjoy doing
On cloud 9
Butterflies in your stomach
To feel nervous or anxious about something
Twist my arm
Convince me to do something
Ball is in their court
It is their turn to do something
Bigger fish to fry
Steal thunder
To take the attention away from someone
Pig out
Eat too much
Have your hands full
You are very busy, don't have time for anything else
Step up your game
Do better, try harder
To postpone something, plan to do it later
Hold your horses
Stop what you are doing and wait
Hands are tied
Hit below the belt
Say something that is hurtful on purpose