The person’s hands and arms move casually, often spontaneously and playfully to the flow of ideas in the present. The wrists may remain soft, and movements are transient; not carrying a lot of weight or seriousness in their delivery. The common phrase “off-handed” perfectly describes the essence of this gesture.
This signal reveals a person who likes going with the flow of ideas, and the creative expression of real-time experience. At the moment the person is engaged in perception surfing, with little premeditation at work. Ideas are coming to them on the fly, and they convey those ideas less so for their accuracy or precision, and more for their conversational value.