omnigeek 

A person belonging all fandoms and groups of geeks; a fan of all geeky things; the ultimate geek; übergeek

Person 1: You really are a gamer geek.

Person 2: Among other geekdoms, yes. I'm an omnigeek! I love all kinds of geeky stuff.

omnigeek by glossophile November 17, 2013

Omnigeek 

Someone who takes an unhealthy interest in everything. Also called an Everything geek. See geek.

Martin knew everything about Star Wars, wood, trains and famous Puerto Ricans. His brother sighed, having an omnigeek in the family meant a lot of time wasted listening to energetic rambling.

Omnigeek by Zacharias Bell January 13, 2009