A term used by 5th grade dropouts usually to obtain free stuff. Common in games such as RuneScape and forums such as GameTalk.
1337 hax0r23: phr33 st0f pl0z lolZ!!!1?
runeplayr931939: Leave me alone, I can feel my IQ dropping by 2 points every minute I'm in your presence.
1337 hax0r23: stfu naabzor i gonna hax u n kill ur fAmily!!!1 haha ownt pl0x n33b