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1.
Watch out that skirt doesn't show your nethers!
by T. Denton November 26, 2005
 
2.
Nether realm,
1. Another world for myth creatures.
2. Demon world
3. A dimension of Evil or imagination

I sent the reaper back to the nether world where he came from.

I found a portal to the nether realm
by Dustin Hoblin November 13, 2007
 
3.
A hell world in Minecraft. Certain mobs spawn there, such as Ghasts and Zombie pigmen. The Nether is accessible via Nether Portals
Person 1: I'm going to go to hell.
Person 2: Couldn't you just go to the Nether?
by buttonjammer August 14, 2012