It is similar to a stud muffin, but he/she also is at every party you go to. You will see them for sure at every party, also can be called a partyholic or party rocker.
When a group of testosterone filled hetero or homo men decide out of boredom to jerkoff on a muffin, the last one to blow his wad has to eat the muffin
The guys were bored so they threw a wet muffin party.
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.