The definition varies; just ask the holy lord and savior of the Capetian Dynasty and Han Dynasty. It’s the ultimate insult that can only be used every half life and destroys people’s career.
Nick: You are a FASSYKISSER!
Sean: No, Nick you’ve ruined me.
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.