Busjuice is the mysterious clear/slightly dirty liquid that always seems to be on the floor of every bus. You are never quite sure what this liquid is and it is probably not worth coming into contact with.
"Hey lets go sit over here there's some free seats"
"I don't think so, look, theres a big puddle of bus juice underneath the seats"
"It smells funny"
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.