Never Bite The Hand That Feeds You: do not hurt the person who is helping or has helped you
Example: It's a bit like biting the hand that feeds you. If you leave the company after you've spent three years training.
New York minute: A minute that seems to go by quickly, very short amount of time
Example: You are taking about me again! I’ll be ready in a New York minute.
Nickel and dime someone to death: to make numerous small monetary charges that add up to big and serious impact.
Example: Government is nickel and dime you to death.
No Dice: an unacceptable alternative or an explanation that something will not happen.
Example: Can you come for me this weekend? Sorry, no dice. I have to be at home.
No Room to Swing a Cat: a place or space that is very small
Example: New house is too small for family, there is no room to swing a cat!
Not a spark of decency: a person who has no manners
Example: You have to be careful with that person who does not have a spark of decency.
Not My Cup of Tea: do not like it or interested in it.
Example: Many people really like Picasso’s paintings. Just that is not my cup of tea.
Not Playing With a Full Deck: Someone who lacks intelligence.
Example: Don't read this book any more because the writer is not playing with a full deck.