When I was 7 and dropped off at Grandma's for the weekend, she would make me take a bath before bedtime and would shout from 3 rooms over "Make sure you remember to scrub your dingflod!"
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.