Simply vibing listening to
music, usually when doing absolutely nothing else besides listening to
music, but you could potentially be doing some other things. For example, if you and a bunch of friends are sitting in your room just listening to
music, that would be mucking. You could also call individual people that do this act a "mucker". However, if there is a group of said people, they will be called "meek" because the plural of muck is meek. Perchance, of course.