Feel a bit under the weather
feeling slightly sick
It takes two to tango
action that needs more than one person
Let the cat out of the bag
To share information that was a secret
Don't count your chickens before they hatch
Don't count on something happening until after its already happened
You can't judge a book by its cover
Can not judge something based on its appearance
Getting a taste of your own medicine
Being treated how you have been treating others
He is on the ball
He understands the situation/topic well
Letting someone off the hook
Not holding someone accountable for something
Biting off more than you can chew
Taking on a task that is too much to handle
At the drop of a hat
do something instantly without hesitation
Once in a blue moon
rarely happens
Like two peas in a pod
Two people who are always together
Piece of cake
a task/job that is easy to complete
Fit as a fiddle
Being in good health
Run like the wind
to run very fast
Ball is in your court
It is up to you to make the next decision/step
A dime a donzen
Something that is very common, not unique
The elephant in the room
an issue or problem that someone is trying to avoid
He has bigger fish to fry
He has more important things to take care
Having your head in the clouds
you are day dreaming
Steal someone's thunder
Take credit for something they did and not you
The whole nine yards
includes everything it possibly can
I can't seem to wrap my head around it
Having trouble understanding
Giving someone the cold shoulder
Ignoring someone
Heard in through the grapevine
Hearing rumors about someone or something
The ring cost an arm and a leg
It is very expensive
Pulling someone's leg
joking with them
It goes in one ear and out the other?
Forget immediately
Take with a grain of salt
Don't take it too seriously
HItting the nail on the head
Performing a task with precision
Best thing since sliced bread
a good idea, invention or plan
Cutting Corners
Not performing a task correctly in order to have time/money
Beat around the bush
Avoid sharing you true feeling to avoid hurting feelings
Going on a wild goose chase
Doing something that is pointless