In korean 'sa' means 'die', 'rang' means 'together' and 'hae' means 'do/doing'.
Saranghae literally means let's die together, let's live together until we die.
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.