Once in a blue moon --> Something that happens very rarely.
Example -->Once in a blue moon day, I get time to spend with my family.

Beating around the bush --> Avoiding the topic.
Example -->The politician was beating around the bush when citizens demanded a reason for the scam.

A Leopard can't change his spots --> You cannot change who you are.
Example -->Rahul is always running after women, and highly doubt if marriage will change him for the better.

It's Greek to me --> Something that is not understandable.
Example -->I failed in my coding test as it was all Greek to me.

Chip on your shoulder --> When someone is upset about something that happened a while ago.
Example -->He has a chip on his shoulder for being abandoned by his friends in school days.

Cry over spilt milk --> Complaining about a loss or failure from the past.
Example -->There is no use of crying over spilt milk, insted be cautious in the future.

Piece of cake --> Something that is easy to understand or do.
Example -->I never said that training him would be a piece of cake.

Blessing in disguise --> Something good and useful that did not initially seem that way.
Example -->The course that i choose was a blessing in disguise and I realised that only now.

Come hell or high water --> Possible obstacles in your path.
Example -->I have decide that come hell or high water I will finish this task.

Taste of your own medicine --> When someone receives the same treatment, usually negative, that he/she gives to others.
Example -->Bad people will surely have a chance to taste their own medicine.

Golden Handshake --> A big sum of money given to a person when he/she leaves a company or retires.
Example -->It's better to offer a golden handshake to the aged employees.

Mean Business --> Being seriousdedicated.
Example -->The border is surrounded by forces who mean business.

Apple of one's eye --> Being cherised more than others are.
Example -->My mother is always an apple of my family's eye.

The best of both worlds --> The benefits of widely differing situations, enjoyed at the same time.
Example -->I had the best of both wworlds since I worked as an ordinary member of the team but got to learn from the leaders.

Feeling a bit under weather --> Feeeling slightly ill.
Example -->I am not going to gym today, as I am feeling a bit under the weather.

Icing on the cake --> Something that turns good into great.
Example -->I got MS in the university that I wished to and scholarship was like icing on the cake.

Jump the bandwagon --> To join a popular activity or trend.
Example -->When I put on few pounds, I quickly jumped on the bandwagon and joined gymnasium.

Cost an arm and a leg --> Be very expensive.
Example -->My laziness costs me an arm and a leg every time.

Ball is in the court --> When it is up to you to make the next decision or step.
Example --> Now the ball is in my court, and i will take revenge on him.

Bite off more than you can chew --> To take up a task which you may not be able to accomplish due to lack of ability.
Example --> I bit off more than i could chew when i decided to take up this research project.

Can't judge a book by its cover --> Can not judge something primarily on appearance.
Example --> It is wise not to judge a book by its cover.

Hear it on grapevine --> To hear rumours about something or someone.
Example --> I heard it on grapevine that he has cheated the organisation

It take two to tango --> Actions or communications need more than one person
Example --> The manager realized that it takes two to tango before firing me.

Last straw --> The final problem in a series of problems.
Example --> If i complete thos last straw i will be hired.

Break the ice --> To initiate a social conversation or interaction.
Example --> Always break the ice in a group discussion.

A bird's eye view --> A view from a very high place that allows you to see a very large area.
Example --> Eiffel tower give you the bird's eye view of paris.

A litmus test --> A method that helps to know if something is correct.
Example --> Taking up the job served as a litmus test for me to know how good i was at applying my knowledge.

At the drop of a hat --> Willingness to do something instantly.
Example --> She expects me to makes dinner at the drop of a hat even if i am very busy with office work.

Afraid of one's own shadow --> To become easily frightened.
Example --> My friend is afraid of his own shadow after watching a horror movie.

A house of cards --> A poor plan.
Example --> My friends always come up with a house of cards.

Black and blue --> Full of business
Example --> My brother came home black and blue after playing

To be in the doldrums --> To be in the low spirits.
Example --> Avoid being in the doldrums it fails you.

Be on cloud nine --> Be very happy.
Example --> I will be on cloud nine when i get a job.

Bone of contention --> A subject of issue over which there is continuing disagreement.
Example --> The examination system has long been a serious bone of contention in the HRD ministry.

Eat humble pie --> To apologize humbly
Example --> He will have to eat humble pie for the disrespect shown to his boss.