Animals
It’s raining very hard.
It’s raining cats and dogs.
The one who takes the earliest opportunity to do something will have an advantage over others.
The early bird catches the worm.
To catch a person in the act of doing something wrong
Caught Red-Handed.
An especially easy task.
Piece of cake
To feel sick.
To be under the weather.
Wait a moment; slow down.
Hold your horses.
Don’t make plans that depend on something good happening before you know that it has actually happened.
Don’t count your chickens before they hatch.
Happening in a way that is sudden and unexpected, and does not seem connected with anything that happened before.
Out of the blue.
These fruit are good for your health.
An apple a day keeps the doctor away.
To feel healthy or well again.
To be as right as rain.
Very uncomfortable.
Like a fish out of the water.
The things you already have are more valuable than those you hope to get.
A bird in the hand is worth two in the bush.
Rarely.
Once in a blue moon.
Two people who are always together.
Like two peas in a pod.
The worst possible situation.
A perfect storm.
A person who is enthusiastic and wanting to do something very much.
Eager beaver.
Achieve two goals at once.
Kill two birds with one stone.
Badly bruised.
Black and blue.
To praise something for being especially great.
Best thing since sliced bread.
To hear a rumor about something.
To get wind of something.
Being inquisitive may get you into trouble.
Curiosity killed the cat.
Similar people usually become friends.
Birds of a feather flock together.
The things a person does not have always seem more appealing than the things he or she does have.
The grass is always greener on the other side.
Comparing two things that cannot be compared.
Comparing apples to oranges.
To take credit for someone else’s work or achievements.
Steal one’s thunder.