Idioms, at times, seem grammatically unusual as well. Idioms are a collection of words or phrases which have a figurative meaning that is generally well established and known. 

Idioms are often used in stories, poems, and even in spoken words. Let us check some really creative and common examples of idioms and their subsequent meanings.

It's not rocket science

It's not complicated

Better late than never

Better to arrive late than not to come at all

Once in a blue moon

Once in a while, infrequently

No pain, no gain

You have to work for what you want

Judge a book by its cover

Rely on outward appearances

Wrap your head around something

Understand something complicated

Time flies when you're having fun

You don't notice how long something lasts when it's fun

Speak of the devil

The person we were just talking about showed up!

A piece of cake

An easy task/job

Miss the boat

It's too late

Hang in there

Don't give up

Penny for your thoughts

Asking someone what is on their minds

Beat around the bush

Trying to avoid a subject/person/situation

Burn the midnight oil

Work or labour late into the night

Kill two birds with one stone

Accomplish two things with the same effort

A dime a dozen

Very common/commonplace

Hit the road

Begin one’s journey

Have a blast

To enjoy oneself, have a good time