1: Losing badly at something
2: l337 (online) slang for 'owned'
3: The mis-spelling of 'owned'
4: Getting showed up/embarressed in a public event by someone/something
Example for 1:
Ryan loses to Brian
Brian: "Hahaha, you got PWN3D!"
Example for 2:
"omfg d00d i pwn3d him cuz i r r0xx0rzz"
Example for 3:
"And then I pwn3d him at Halo"
"Whoops, I mean owned"
Example for 4:
Person A: "I spent a long time writing the entire script to Harry Potter"
Person B: "Yeah, I downloaded it off the internet too"
Person C: "PWN3D!"
by Sam Harrison January 08, 2004