Nwned (and alternately Nowned) is shortform for "Narcotically Owned" and refers to the state of being following predigious consumption of multiple drugs within a brief period of time.
Stoner #1: You should have been there last night man! We smoked a shitload of weed, ate mushrooms like Super Mario and dropped acid until the end of time.
Stoner #2: Sounds like you got fucking nwned.
Stoner #1: I still can't feel my face.
Stoner #2: Sounds like you got fucking nwned.
Stoner #1: I still can't feel my face.
by Corey McCutcheon August 22, 2008