A childish man with 2 left feet and a questionable sense of style. Can be found on the dancefloor flopping around. Also has a side job at a German school, when he's not busy embarrassing his friends.
Man 1: Look at that dude on the dance floor, such a Jammu!
Man 2: I'm so embarrassed if he'd be my friend
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.