The art of banging your friend's wife without him knowing. This is usually done in his bed, and it's common to wipe your cock off on the curtains when you're done.
I've been CaptainNeil'ing my best friends wife, he hasn't noticed the creamy stripes on his curtains yet... WINNING!!
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.