Let's enjoy some of the English idioms!

[Indy]

As thick as thieves

Meaning: close friends

Me and my friend Nick spend every weekend together. We are as thick as thieves.

[Indy]

To pull the wool over someone's eyes

Meaning: to mislead somebody

He said that the project was ready, but I knew that he was pulling the wool over my eyes.

[Indy]

To beat about the bush

Meaning: speak about some matter in an abstract manner

That student was beating about the bush during the whole Speaking part of the Exam.

[Indy]

To beat the air

Meaning: to do something useless

He was beating the air during the whole lesson.

[Indy]

To be under the weather

Meaning: to feel ill

I won't go out today, I'm under the weather since morning.

[Indy]

See eye to eye

Meaning: agreeing with someone.

They finally saw eye to eye on that business deal.”

[Indy]

Speak of the devil

Meaning: the person you’re just talking about actually appears right at that moment.

Hi Jane, speak of the devil, I was just telling my friend about your new hobby.

[Indy]

The best of both worlds

Meaning: you can enjoy two different opportunities just at the same time.

By working part-time and studying at magistrature every evening I managed to get the best of both worlds.

[Alexey S]

A blessing in disguise

Meaning: a good thing that seemed bad at first

My best friend turned out to be a blessing in disguise.

[Ann]

Keep at Bay

Meaning:
To prevent someone / something from reaching, attacking, or affecting you.
Examples:
That kid is very problematic; I am doing my best to keep him at bay.

Eating oranges keeps colds at bay.


   
 

I wish I liked oranges more!

[DAS]

I used to use this expression very often.

I also heard it from one of the native speakers many years ago, didn't get its meaning at first and had to look it up in the dictionary. I've been using it quite frequently ever since.

[Ann]

Call it a Day

Meaning
To stop what you are doing because you don't want to do it anymore or you think you've done enough

Examples
I am too tired, let's call it a day
It's such good weather, let's stop working and call it a day!

I used to use this expression very often.

[DAS]

Call it a Day

Meaning

To stop what you are doing because you don't want to do it anymore or you think you've done enough

Examples

I am too tired, let's call it a day

It's such good weather, let's stop working and call it a day!

[DAS]

Shoot the Breeze

Meaning

spend time chatting, useless talking or chit-chat

to discuss unimportant things or exaggerate the truth

Examples

They have spent the whole afternoon just shooting the breeze in the office.
My customers always want to shoot the breeze with me before they say what they were coming to purchase.
Instead of shooting the breeze for so long, she should get to work.

[DAS]

Be Head over Heels

Meaning

To be  very much in love with someone. It is often used to describe the feelings that typically occur at the beginning of a relationship.

Examples

I have been head over heels about my girlfriend since the day I met her.

You should't be head over heels about this guy, he doesn't seem to like you that much