First seen in Bungie.net's Humpday Challenge DOA4 edition. Meaning to be owned, or in the case of a noob, pwned, severely. Most typically by a ninja, or in a stealthy fashion possibly by an assassination, Halo style.
"Joe got Ninjowned." from Bungie.net's article on the DOA 4 Humpday Challenge.
by cauc8Xsens8X January 13, 2006