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1.
an Internet user who has ghost-like abilities by coming and going without definative trace or detection
There was this 1337 user who was coming and going like they were some kind of Webghost making a mockery of us.
by MasterSofTrancE February 21, 2006
 
2.
an elite user of the Internet who is elusive and not easily identified and is likely to have exploited your OS or Network Server
I just had to do a full systems scan for some 1337 user who has been in our network and OS making us look incompetent, he must be some sort of Webghost
by MasterSofTrancE February 19, 2006