It's a moneymaking ritual that is done by a man who is in need of much money especially in the year 2022. It happens mostly to ilorin people, Ibadan or abeokuta
Someone who has made BJJ their whole personality (it can apply to other martial arts as well, but BJJ seems to be the most prominent, hence the stereotypical "oss" salute). They are very likely to indulge in the martial arts version of broscience to explain you in detail why they are now invincible, enlightened and have "left their ego at the door". The higher their belt gets, the more toxic and cult-like they become.
When Jeremy from "Get Out" starts talking about how jiu-jitsu is some sort of chess and tries to put Chris in a headlock, we know that we're dealing with a world class osshole.
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.