Sign of the times?

We got an email yesterday about a new hire, who was labeled "Casual Worker." (They usually say things like "Temp" or "Perm" or whatever.) What in the world is a "casual worker?" I would be very interested in applying for that position. I could easily be a casual worker. I enjoy things casual.

After some jokes to the HR team, it turns out "casual worker" is the new term we're using for interns. Seriously?? Is the word "intern" derogatory or offensive? Probably less so than "casual worker..."

Weird.