bullyball
mike was having too much fun to notice the strange looks from the pedestrians and cyclists as he thumped down the street on a bullyball
one of those large rubber balls with a handle on top that you sit on and use to hop around
"mike was having too much fun to notice the strange looks from the pedestrians and cyclists as he thumped down the street on a bullyball" What is the definition of "bullyball"?