Omniknowledge 

The term describes the scenario of where a certain person/character (usually in roleplaying games) has the miracle ability of knowing basically everything that is to know about the world and has extended experience in all fields.

This is usually a derogatory term used to describe a certain aspect of Powergaming where a character possess the ability to be aware of everything, which more than often leads to a bad look on the person acting on it.

"Yo this guy is a fucking traitor, I know this because the secret agent no one else is aware of told me. I also know where said secret agents base is located at and how to go there. What? Of course I know this, I'm a janitor. I also know how to arm a nuke, do surgery on an animal all while explaining you the wonders of rocket science. I know it all."

"man quit your stupid omniknowledge, it aint no fun when you apparently know everything"

Omniknowledge by florkger June 28, 2019