It is a term used in a kind of new-age mystical "medicine" or hocus-pocus treatment if you like. It is called "Meridian Tapping". The idea is you tap and say magic words and your pain goes away. In the picture below the hand on the left of the picture is tapping, with three fingers, the hand on the right.
Or if you have a headache... The lady is tapping seven times saying at the same time, "Even though I have this splitting headache on the right side of my head, I deeply and completely love and accept myself."
You get the idea.