This term begs to be defined. It's used extensively by one of the Baileygates brothers in the movie Me Myself and Irene. I suspect it's a variation on motha-fukka
The real self-discipline would be if someone in power could stay our of our mamma jammin’ lives.
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.