Don't count your chickens before the eggs have hatched
This idiom is used to express "Don't make plans for something that might not happen".
Don't give up the day job
You are not very good at something. You could definitely not do it professionally.
Don't put all your eggs in one basket
Do not put all your resources in one possibility.
Drastic times call for drastic measures
When you are extremely desperate you need to take drastic actions.
Elvis has left the building
The show has come to an end. It's all over.
Every cloud has a silver lining
Be optimistic, even difficult times will lead to better days.
Far cry from
Very different from.
Feel a bit under the weather
Meaning: Feeling slightly ill.
Give the benefit of the doubt
Believe someone's statement, without proof.
Hear it on the grapevine
This idiom means 'to hear rumors' about something or someone.
Hit the nail on the head
Do or say something exactly right
Hit the sack / sheets / hay
To go to bed.
In the heat of the moment
Overwhelmed by what is happening in the moment.
It takes two to tango
Actions or communications need more than one person
Jump on the bandwagon
Join a popular trend or activity.
Keep something at bay
Keep something away.
Kill two birds with one stone
This idiom means, to accomplish two different things at the same time.
Last straw
The final problem in a series of problems.
Let sleeping dogs lie
Meaning - do not disturb a situation as it is - since it would result in trouble or complications.
Let the cat out of the bag
To share information that was previously concealed