Masterer

[Renato]

A leet way to say master or pro in video games.
The word most probably originate from the video game comedy series [purepwnage] (www.purepwnage.com). In that serie, the [Masterer] is the master of all [the pro] players in the meeting happening in the 15th episode.

[Cami]

A person who masters or overcomes someone or something. Chiefly figurative.