When is a professor not a professor, but still a teacher at heart? When does the phrase "Kilroy Was Here" refer to a 1983 progressive rock album and not the caricature of a person peeking over a wall dating from the 1940s?
"Hey, have you been to any of professor_kilroy's classes? I heard that he's working on becoming a certified instructor. Also has been known to stream on Twitch from time to time."