What do these net abbreviations mean

[partygirluk]

nt (I guess nice thread)
nm
n00b
pwned.

[Leo99]

NM = never mind
N00b = newbie = new user = not wise in the ways of ...

[JinX11]

pwned (http://www.urbandictionary.com/define.php?term=pwned&r=f)

[ClaytonN]

nt - nice try
nm - never mind
n00b - newbie
pwned - owned (made popular by misspelling, since p is right next to o)

[IsaacW]

"nt" can also mean "No Text," and is used when someone responds to a post on a forum by only using the subject line.

pnwed is a (now intentional) misspelling of owned, similer to "teh." It means that someone has been put in their place.