A mungmaster is required to perform what is considered the most skillful, disgusting and deadly acts munging. To become a mung master one must have been directly involved in a mung baptism and have served aboard a mungtrain. Only a mungmaster can become a mungtrain driver.
When someone has gotten a lot more intoxicated than any other members of the group. The bungmaster usually has vomit on their nose/upper face, takes casual swims, and hooks up a plenty. Bungmasters also have large lips and really enjoy the odd racist joke. The next day they are no fun, but come nighttime, they take the reigns of the gathering and resume their title of master of the bung.
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.