That moment where you take a test, completely unaware about what the subject matter is about. And when the test grades come in, you get a 97 to a 100 on it. You are then treated like a God, and you probably get laid several times, just because of one test you didn't study for.
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.