Neko Heal Edit
Neko Healing is when healers will heal outside their group. The goal is for healers to keep everyone alive, since many people might be taking damage, and the fight is not complex enough to spend the time setting up complex healing assignments.
It might be used for easy trash pulls, or when the guild leader is making groups between boss fights.
To a healer, hearing the raid leader say "Neko Heal" means to watch everyone's HP and keep them up as necessary.