Yes, Rag - In this sense that stands for "Quality Assurance", which is a term used to reference employees testing specific things to make sure they work as intended.
You may have seen people here from time to time complaining that Larian are both using the EA testers as their unpaid QA team, but also not acknowledging the feedback or helping them do the job properly with the information exchange that would usually be required to do such work effectively.
