This is used by the Dream smpfandom to make others cry. It means 'thank you for showing me what it's like to be human' said by Slime is Quackity's lore video right before he died.
Person 1: tyfsmwiltbh
Person 2: huh?
Person 1: if you know, you know Person 3: *cries*
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.