The euthanasic term for "silly ass".
It's used for referring to someone who is extremely silly or just plain ridiculous.
It could also be used to poke fun and tease someone as it assumes that they are ignorant and immature/childish.
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.