A mangle (as it is called in the United Kingdom) or wringer (as it is called in the United States) is a mechanical laundry aid that helps wring out clothes. It sort of made sense when you read the whole sentence.

I don't know who supports Puddlemere United. I know Dumbledore does...and I think Oliver joined the team, but...

And bulrushes are the things on the Puddlemere United symbol-thing.

...I assumed the uvula was somewhere around your throat 'cause it would stop you from talking?