The given tag "rab" does not seem to be a clear or specific porn video tag. However, if you meant "RAB," which could stand for "Rough Anal BDSM", it would mean:
1. Rough: This indicates that the scene involves rough or aggressive sexual activity.
2. Anal: The scene includes anal sex, which is penetration of the anus by a penis, sex toy, or finger.
3. BDSM: It features elements of BDSM (Bondage & Discipline, Dominance & Submission, Sadism & Masochism) such as restraints, spanking, and power dynamics between participants.
Please provide more context if you need further clarification or explanation.