The word, nipkin, means a smaller version of "napkin". This smaller version is often used in school, like elementary to middle school. (That's just what I remember).
Jose: I need a nipkin! Does anyone have one?
Alex: Here bruh! I had a spare nipkin just in case you split a bit of milk!
Jose: Haha. Thanks dude!
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.