A tourist that know way too much of the culture in the country he is visiting. A super gaijin also often speaks the native tongue and socialises a lot with locals. Seems himself as somewhat better then a regular tourist. You can often spot a super gaijin by his giant backpack, dreadlocks and lack of career.
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.