look up any word, like blumpkin:
In the realm of Pokemon, there are those who battle competitively. Memorizing Pokemon base stats and comparing them against others to determine results without past experience is known as Theorymon.
Battler #1: Salamence would be able to switch in, Dragon Dance and sweep your entire team

Battler #2: Pfft, that's all Theorymon, you don't know that for sure.
by Videogamefool August 14, 2010