Two's up is a very old Yorkshire expression meaning, "Save me a small amount of what you're currently consuming" It was originally used by miners who were hungry and wanted a piece of pie from one of their more fortunate colleagues. It became more popular in the 70's and meant "share your cigarette with me".
I've left my fags at home, two's up on your rolly (hand rolled cigarette)"
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.