Don’t bite off more than you can chew.
Don’t take on more than you can handle.
Call it a day.
That’s the end of something. We are all done for today.
By the seat of your pants.
To do something luckily by instinct or without a lot of preparation.
I’m a basket case.
I can’t do anything because I’m stressed out or panicked. I’m going crazy.
Butterflies in my stomach
I'm nervous
You are barking up the wrong tree.
You are looking in the wrong place or asking the wrong person.
You’re a couch potato
You’re lazy.
It’s raining cats and dogs
It’s raining really hard.
Bite the bullet.
Endure a bad situation or get it over with. It’s something that has to be done, so just do it.
Don’t add insult to injury
Don’t make it worse than it already is. Don’t mock and make someone feel worse than he already does.
By the skin of your teeth.
You just barely missed that, usually talking about narrowly escaping a bad thing.
Clam up.
To stop talking. Suddenly quiet, shy, or scared.
Beat around the bush.
Talk about something, but never get to the main point. Hint at a topic or avoid a topic that you don’t want to talk about.
I’m all thumbs.
I’m clumsy or awkward. I can’t do small things with my hands.
Quit busting my chops.
Stop getting after me, scolding me, or harassing me.
They’re a dime a dozen.
They are common, inexpensive, and you can get them anywhere.
Break a leg.
A saying that actors say to each other to mean “good luck.”
Cat nap.
A short rest or sleep.
I’m all ears.
I’m listening intently or waiting to hear what you have to say.
At the drop of a hat.
Do something instantly.