A way of telling some one to calm down or to chill. Can also be used when something is personal and you want to say don't worry about it. Can be used to say you will relax.
You guys are making too much noise, you need to chill on it.
"So I saw you two together last night, what went down?"
"Chill on it"
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.