A camper or douchebag that far surpasses the typical level of asshole behavior found in the online gaming realm. Used to describe someone who is highly despised.
Most literally, it describes one who holds magical abilities that are attuned to the art of being a complete fag.
See: fag + mancer
Dammit, that fagomancer just camps behind the boxes and makes fun of whoever he catches by surprise. Lots of skill there.
Fantastic, amazing, and spectacular all in one. If you're fasmatic, you're an incredible person! Females are often called this when they are too hot to handle.
"Dang, did you see Taylor today?"
"DAMN. She's fasmatic! Maybe I can tame her."
A person so dedicated towards a specific interest that their former heterosexual origin is brought into question, therefore faggotizing them. This individual is a fagnatic.