To improve or perfect, usually regarding a skill.

A hot or incredibly attractive person. Used primarily on Australian streets to alert friends of a sexy passerby.

special people; Used in any context

Adjective describing something or someone stinky or smelly. (South African)

Of exceptional quality or beauty, or otherwise acute, intense, or effective. Used briefly in Southern California youth culture in the late 70's and early 80's, possibly among the skater community.

When a player on a video game gets owned hard.
Either with a head shot or another type of ownage.

To derp as a game provider and not have the server capacity or smarts to counter DDoS. In return the servers are unplayable for days on end.