Going commando (without underwear) while wearing jeans. Which is a really stupid thing to do, because jeans are tight and stiff and rough and would make it extremely uncomfortable.
1:"Karen wasn't wearing any underwear last night."
2:"But she was wearing jeans. She went retarded!"
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.