Bludger

In Australia isn't the term for someone who behaves like this "Bludger"?

TPN :: GDay World 2009

Despite all of the excitement of the Galapagos Islands, Ayllyn N. Franco of Bludger Hecha Letras [es] makes a point to let everyone know that Ecuador also has the Amazonian region in the competition.

Global Voices in English » Ecuador: Galapagos Islands Advance in 7 New Wonders Competition 2009

Harry tries to intervene and McLaggen ends up smacking him in the head with a Bludger that he had hit using the bat he stole from his teammate.

Lianna Kong: Half-Bloods, House-Elves and Horcruxes: Chapters 16 - 20 of Harry Potter Book 6 2008

Roll the die and try to hit your opponents with the Bludger, knocking them off their broom.

Archive 2007-07-01 2007

"I know, mate, " said Ron, who looked as though he had recently been hit on the back of the head with a Bludger, 'so it's now or never, isn't it?

Harry Potter And The Deathly Hallows Rowling, J. K. 2007

'All right,' called Angelina, 'Fred, George, go and get your bats and a Bludger.

Harry Potter and the Order of the Phoenix Rowling, J. K. 2003

'It was that thug Crabbe,' said Angelina angrily, 'he whacked the Bludger at you the moment he saw you'd got the Snitch - but we won, Harry, we won!'

Harry Potter and the Order of the Phoenix Rowling, J. K. 2003

'- Pucey throws to Warrington, Warrington to Montague, Montague back to Pucey -' Johnson intervenes, Johnson takes the Quaffle, Johnson to Bell, this looks good - I mean bad - Bell's hit by a Bludger from Goyle of Slytherin and it's Pucey in possession again ... '

Harry Potter and the Order of the Phoenix Rowling, J. K. 2003

'I mean, what about Crabbe and that Bludger he hit after the whistle had been blown?

Harry Potter and the Order of the Phoenix Rowling, J. K. 2003

It was hard to say what the worst thing was: Harry thought it was a close-run contest between Ron's fourteenth failed save, Sloper missing the Bludger but hitting Angelina in the mouth with his bat, and Kirke shrieking and falling backwards off his broom when Zacharias Smith zoomed at him carrying the Quaffle.

Harry Potter and the Order of the Phoenix Rowling, J. K. 2003