Everything2 slang term for a user with one thousand or more write-ups to their credit. M-noders get their name from the Roman numeral M, which means one thousand. Lesser-used terms D-noder and C-noder refer to users with 500 and 100 write-ups respectively. The amount of time invested into 1,000 good-quality write-ups is incredibly vast, unless you're a bot, so being an M-noder is truly a remarkable achievement.
Being an M-noder entitles you to enter the Everything M-Noder Washroom and wear the M-noder t-shirt.
The Oolong Man notes that M is the SI prefix for Mega, or 106. The Oolong Man is also drunk.