The study of why the hell anything exists, especially from a human point of view, not just textbook philosophy: consciousness, life, death, purpose, meaning, gods, chance, and the uncomfortable fact that we are here asking questions we may never fully answer yet we still ask.
Example 1. After too many late nights thinking about all the things; God, death, love, and why anything matters, he stopped calling it overthinking and started calling it existology.
Example 2. His existology is simple enough to say and hard enough to live with: nobody handed us meaning, so we have to decide what truly matters.
The study or art of being a massive nerd at every possible opportunity, especially when completely unnecessary. Someone who has mastered ermatology is known as an ermatologist.
Dave: 77+33=100
Melvin: Erm, ackshually, 77+33 does not equal 100, it instead, as a matter of fact, equals 110. 70+30=100, this is fairly basic addition and is commonly taught in elementary school.
Dave: Holy shit, it's a joke. Do you have a masters degree in ermatology or something?
Pajama casual is a term used when working from home and preparing for a video conference. All business above the waist and your pajama pants down below.