The “deep” is a prophetic metaphor of mystery. It exists, but it is hidden. The deep of God called to the deep in the land. It is hidden in the hearts, in the people and places, that produces what-God-wants when fulfilled.
I actually think of grave sucking: people who do not know how things work in the spirit attempt to receive anointing from graves, and critics who do not know how things work in the spirit make up a term to make fun of a funny practice.