Is there a such thing as a floating cyst?

Rarely. After looking at google search results, a couple of cases of floating cysts are found. One is a tiny cyst (a little round thing with liquid in the center) floating in the liquid of the eyeball in front of the pupil and iris. Another is a cyst in the abdomen of a fetus (it formed from an ovary that had twisted off its normal connections). Floating cyst just means it is not connected to something.