Central America 
The southernmost part of North America, linking the continent to South America and consisting of the countries of Guatemala, Belize, Honduras, El Salvador, Nicaragua, Costa Rica, and Panama.
- not put it past someone
- not quite
- not quite the thing
- Notre Dame
- not right in the head
- no-trumper
- no trumps
- not see further than one's (or the end of one's) nose
- not-seeing
- not see someone for dust
- not-self
- not sleep (or get) a wink (or not get a wink of sleep)
- not so dusty
- not someone's day
- not someone's idea of
- not so much —— as ——
- not stand (or have) an earthly
- not stand the ghost of a chance
- not suffer fools gladly
- nott
- not take kindly to
- not take no for an answer
- Nottaway
- not that
- not the full quid