Generally speaking, an old, wrinkly, long-lobed, snow white haired person that drives way too slow in the left lane, that's oblivious to all else around him or her.
Jesus Christ, look at that foofoofnik driving so slow, they can't even see over their steering wheel!
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.