Mostly used by 8 year olds playing starcraft or warcraft who think they're cool. Also said by retards who can't type and think that saying pwned will make them cool.
I can't type as fast as a think I can, so I accidentally hit 'p' instead of 'o', and somehow people think 'pwned' is cool, rather than stupid. I pwned those mofos
"Owned" typed by someone without the ability or thought to correct their spelling. The accepted use generallyestablished the user as one of subpar intelligence.
a word that people name anthony use to make themselves feel like they know a special word, when in actuality isn't anything more than a bunch of letters thrown together and said outloud.
PWNed is a misspelling of the word owned. The P is right next to the O key, so that's most likely how it came about. Before it's popularity, I am pretty sure we all used it.