No great shakes
Mediocre, unimportant.The hotel was no great shakes and I would not recommend that my friend stay there.
Next of kin
One's closest living relative or relatives.The police notified the dead woman's next of kin after the accident.
Nothing to sneeze at
Something that you should take seriously and respect.The man's new salary is nothing to sneeze at.
Nothing to it
Easy.There was nothing to it and I was able to fix the television in about ten minutes.
Nothing to complain about
Everything is all right.I told my boss that I had nothing to complain about regarding my job.
Not take no for an answer
To not accept someone's refusal.My aunt would not take no for an answer when I said that I could not eat dinner at her house.
Not (someone’s) cup of tea
To be not something that one likes.Classical music is not my friend's cup of tea so she did not go the the concert with the others.
Not so hot
To be not very good.I have been feeling not so hot lately because I had a cold last week.
Not sleep a wink
To not sleep at all.I am tired today because I could not sleep a wink last night.
Not show one’s face
To not appear.We asked the man to not show his face at our restaurant if he was not going to behave properly.