closed season 
noun chiefly North American
Another term for close season.
- not know what hit one
- not know what to do with oneself
- not know where (or which way) to look
- not know where to put oneself
- not know which way (or where) to turn
- not least
- not let the grass grow under one's feet
- not-life
- not likely!
- not like the look (or sound) of
- not-living
- not long ago
- not-me
- not mince words (or one's words)
- not miss a trick
- not move a muscle
- not much chop
- not much cop
- not much in it
- not much (or a lot of) fun
- not nearly
- not necessarily
- not-ness
- notochord
- notochordal