The prefix derives from the name of Scotland, where guys wear skirts and play faggy, annoying bagpipes. Use in place of the word queer, gay, fag, or any slur for a homosexual when being used before the word bag to insult a friend.
A combination of "spotting" and "tea-bagging". I was at the gym watching a guy spotting for another guy who was doing bench presses. The guy who was doing the spotting was standing right over the face of the guy who was doing the bench presses. The term just seems self-evident.
Josh was trying for a new personal record on the bench press, but his spotter, Zack, was in a playful/sick mood. Before Josh's record set was finished, he'd become the victim of a spotbagging.
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.