1. When a person suffering a beat down, defeat or humiliation finally succeeds in owning, humiliating or likewise getting revenge.
The more banter, longer time passed, higher the stakes, and greater the victory, the greater the kudos.
2. A player who has had a long streak of defeats, turns the tide of pwnage to become the underdog victor.
"How did you beat me at Tekken!? I always mop the floor with you but today you kicked my ass! I don't believe it! Total revenge of the fallen, man!"