Geocentric

An astronomical belief that was popularly accepted during time periods between the 2nd Century AD/CE until the 16th century. The main aspect of this astronomical belief was that the Earth was considered to be the center of the solar system, and universe, because of how planets and the sun seemed to revolve around the Earth. During the 16th century, however, it was proved wrong, and replaced by the more commonly accepted heliocentric model (the sun being the center of the solar system). The person who proved it wrong was a well renowned astronomer by the name of Galileo Galilei, whose ideas were considered a threat to the validity of scripture, and thus religion (another incident where religion impeded upon the advancement of scientific knowledge).
Can also be used as a term to describe a person whose main points in an argument are based off of what is a commonly accepted belief. Often these people are ignorant af, unable to cope with their own stupidity because they are too busy arguing about distant, and unrelated topics that nobody cares about.

Pope: "WTH, Galileo! YTheck are you devising an alternative to our geocentric model based on the geocentric theory???"
Galileo: "Because you're wrong, and I have observed the heavens for, like, the entirety of a long time..."
Pope: "But we are God's special creation, so you must be wrong!!!"
Galileo: "Tell that to my telescope..."
Pope: "We have believed in the geocentric model theory for such a long time!"
Galileo: "My telescope ruined that career then."
Pope: "You're committing heresy!!!"
Galileo: "For discovering something true?"
Pope: "Arrest him! He is speaking and producing heresy for his truthful findings, and the church cannot be wrong because it has been telling people how to live and what to believe for the past idk, several thousand years, so you cannot be right! Our historical records all point towards the geocentric theory, and you are wrong!!! Even Ptolemy's retrograde discovery proves you wrong!!!"
Galileo: "Ever notice that Venus goes through the same cycles as the moon?"
Also Galileo: *gets dragged away, imprisoned in his home while having bad health, declared a heretic, and then struggles for the next two decades because of the church's ignorance...*
Galileo: "Ever heard of this lovely thing called '

Geocentric Athlete

An athlete who pursues outdoor pursuits of geographic significance. Ie: a mountaineer who climbs Everest mountain because it is the highest peak, the sailor who sails around the globe and the seven seas, the Navy Seal who swims across the equator as a special initiation ceremony. These pursuits are consistent of those of the geocentric athlete.

Griff is biking across North America, then sailing the seven seas. He's one hardcore geocentric athlete.