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Rolling down a hill in a giant hamster ball
"Dude! That guy is totally zorbing! Look at him go!"

"Dude! I went zorbing today in San Fransisco"
by Evangeline Pelagia August 18, 2009
the act in which a man tapes his scrotum to his anus and then quickly sits down on a hard surface.
My doctor told me to stop zorbing else I may rupture a ball.
by Johnny_H January 25, 2013