A person preferably a male who has unsightly weight coming from his waistline on both sides. Some people have a belly in addition to wide waist but wide waist describes the fat pockets on the persons sides.
Yo! John that shirt is too tight for you. I can see that nasty wide waist of yours. You need the loose fit for real!
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.