Slang that originated from /pol/ that is used for Great Britain (mainly England) to emphasise the Muslim immigration. A mix of Britbong and *stan, which is a common suffix for Muslim ex-USSR countries.
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.