also known as orb rolling, sphereplay, sperical balancing, etc. is the act of juggling with fushigi balls (or other balls for that matter).

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

The art of manipulating a man's testicles. The act should appear to be very fluid and magical, similar to Fushigi.