Feeling blue
Feeling down
Small warning / information
Hold your horses
Guilty Pleasure
something you genuinely enjoy but feel slightly ashamed or embarrassed about
Break a leg
wishing good luck
Drive up the wall
Making someone feel crazy
Piece of cake
I’ll play it by ear
Decide later
I’m beat
tired
under the weather
feeling ill
Someone who is lazy
Not the sharpest knife in the drawer
Not the smartest person
That's a rip off
Too expensive
Cold turkey
abruptly withdraw from an addictive substance or behavior, like smoking
Broken record
Someone who repeats themselves
Rain check
Change plans
Cut me some slack
Be more patient/understanding
Let’s touch base later
Talk again later
Bring home the bacon / Get that bread
Earn money
the cat's out of the bag
revealing a secret
Preach to the choir
persuade people who already agree with you
Calling Shotgun
Riding in the front seat
Throw you under the bus
To betray someone for self-advancement
Bat out of hell
someone or something is moving especially fast
Pot calling the kettle black
Being hypocritical