Stands for "Camp Friends Are Best." it is used to refer to camp friends in all situations: while talking to your camp friends, while talking to other people about your camp friends, or really just any situation involving camp friends.
Said when someone is winding you up, especially when using acronyms and grammatically dubious ways of doing so like "My bad" and "LMAO"... Enough! CFAB!
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.