Commonly refers to someone that acts and looks like a retardedhobo. A hobo that is very dirty and with a long and fuzzy beard. Very close to a retarded and dirty Santa Clause.
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.
We have a Zoom meeting in a few minutes and I’ll probably go pajama casual.