Extension of owned, pwned and fwned, designed to subvert apparently "cool" but actually meaningless internet slang.
Created randomly to confuse other messageboard users and see if it would catch on.
DAVE: "ZOMG, WTF? I just got gwned!!!1!!"
GLENDA: "Who talks like that?"
DAVE "STFU hor."
GLENDA: "I'm leaving you."