A person who lives above you and makes a point to stomp on the floor because you are talking downstairs and it is too loud for them, or flush the toilet, or watch TV.......
What was that loud thud up stairs? Oh just fee fi foedum sitting listening for any noise, then he stomps.
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.