From LeakyPedia

Shuntbumps is sport played on broomsticks that was invented in Devon. The game is basically jousting on brooms. The aim is to knock as many players off their brooms as possible. The last wizard or witch flying is considered the winner. Shuntbumps is still played in England but only by children.^[1]

[edit] References

1. ↑ J. K. Rowling, QA 2