Accomplish two different things at the same time.
Kill two birds with one stone
Try to do something that is too difficult for you.
Bite off more than you can chew.
Someone who is very annoying.
A pain in the neck
Deal with a problem if and when it becomes necessary, not before.
Cross that bridge when you come to it
When someone understands the situation well.
On the ball
Stop yourself from saying what you really think
Bite your tongue.
A relationship experiencing problems
To be on the rocks
Don't put all your resources in one possibility.
Don't put all your eggs in one basket
Be happy when a person leaves.
Be glad to see the back of...
"Don't make plans for something that might not happen".
Don't count your chickens before the eggs have hatched
Very similar, especially in appearance.
Like two peas in a pod.
Actions or communications need more than one person
It takes two to tango
It is raining very hard.
It's raining cats and dogs
Without any hesitation; instantly.
At the drop of a hat
Play a joke on someone
Pull someone's leg
Don't judge something primarily on appearance.
Can't judge a book by its cover
Feeling slightly ill.
Feeling under the weather.
To be really sad after the break-up.
To be heart-broken
Tears that you cry when you are not really sad.
Crocodile tears.
You are responsible to make the next move.
The ball is in your court.
The show has come to an end. It's all over.
Elvis has left the building
The final problem in a series of problems.
Last straw
When you go on a date with someone you don’t know.
A blind date
She made me fall in love with her.
She stole my heart.
To ask someone to marry you
To pop the question
To be the boss, a leader.
To be a big fish.
Suspect that something is wrong in a particular situation.
Smell a rat
Eating an apple each day is good for your health.
An apple a day keeps the doctor away.
When an attempt fails and it's time to start again.
Back to the drawing board
To be in love with someone when you see them for the first time.
Love at first sight
When someone misses his or her chance
Miss the boat
When someone accidentally or unintentionally gives a secret away.
Spill the beans
When two couples go on a date together.
To go on a double date
Come to the point, leave out details.
Make a long story short.
Something that will never happen.
When pigs fly.
When the person you have just been talking about arrives.
Speak of the devil!
Tell a secret.
Let the cat out of the bag.
To get something directly from the person who really knows it.
To get it straight from the horses' mouth
When something is very expensive.
Cost an arm and a leg
To marry someone
To tie the knot
Looking in the wrong place. Accusing the wrong person
Barking up the wrong tree
Being inquisitive about other people’s affairs can get you in trouble.
Curiosity killed the cat
When someone doesn't want to make a decision.
Sit on the fence
A job, task or other activity that is easy or simple.
Piece of cake
Something small and unimportant, compared with something else.
It's a drop in the bucket.
To go to bed.
Hit the sack / sheets / hay
Be optimistic, even difficult times will lead to better days.
Every cloud has a silver lining
Leave things as they are just in case they get worse.
Let sleeping dogs lie
They are no longer a couple.
They broke up.