A person who is home-schooled (or home-educated). They are so named because they do not go to school, much like the children of the past who worked in the coal mines.
A person whose skin color is so black that they resemble a walking, talking (possibly soft-shoeing) piece of coal. He/she could stand in front of a black-painted wall and do a cheshire cat routine.
Yaphet Kotto: "My dear Wesley, you're looking quite black today."
Wesley Snipes: "Moi? Pish, tosh. You, my friend, are a block of solid carbon."
Low income individuals can be quite optimistic about the future when using plastic instead of cash to make purchases. But if, for some reason, they suffer a financial setback, that little piece of plastic may turn them into credit card coolies.
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.