"Hit the books"
To start studying
To read bedtime stories
Throwing books
"Add fuel to the fire"
Start a fire
To make things worse
Cook dinner
"Cry over spilled milk"
There is no point in feeling regretful now
Accidentally spilling milk
Creating a mess
"A piece of cake"
Very easy
A slice of dessert
Something tastes good
"Break a leg"
Falling down
Saying good luck
Injuring yourself
"Break the ice"
Freeze something
Start a discussion
Jump in water
"Once in a blue moon"
The moon is blue
Very rarely
Always happening
"When pigs fly"
Describing an animal that flies
Something that will never happen
Liking animals
"A fish out of water"
Going on a fishing trip
Feeling out of place
Playing in water
"Hold your horses"
To wait a moment
To buy horses
To hold onto a horse
"Butterflies in my stomach"
Feeling feverish
Feeling hungry
Feeling nervous
"Do not judge a book by its cover"
Read more
Do not judge by someone by their looks
Book covers should look pretty
"To spill the beans"
Cooking beans
Causing an accident
Sharing secrets
"Time flies"
Time has no meaning
Time goes by fast
Time is like a fly
"Keep your chin up"
Getting a stiff neck
Stay positive
Always look up