Not up to snuff
Not adequate.My piano playing ability is not up to snuff and I need to practice more.
Not up to scratch
Not adequate.My uncle's golf game is not up to scratch and he always gets a bad score.
Not touch (something) with a ten-foot pole
To consider something completely undesirable or uninteresting.That car is dangerous and I would not touch it with a ten-foot pole.
Not tell a (living) soul
To not reveal something to anyone.I did not tell a soul about my fight with my friend.
Not for anything in the world
Not for anything.I will not for anything in the world go to the restaurant with that woman.
No spring chicken
Not young anymore.My aunt is no spring chicken but she always has much energy.
No sooner said than done
Done quickly.My request to repair the photocopy machine was no sooner said than done.
No skin off (someone’s) teeth/nose
No difficulty for someone.It will be no skin off my teeth if the meeting is canceled.
A no-show
A person who makes a reservation for something and then neither comes nor cancels it.There were many no-shows at the concert last night.
No point in doing (something)
No purpose in doing something.There is no point in talking to my supervisor. He never listens to what I say.