Trivia Contest - Win A Prize!

I always enjoyed reading to my son at bedtime when he was little - and reading with him when he was a little older.  He liked to read books that were a series, and one of our favorite series was the magical world of Harry Potter.  I'm sure many of you have read those books, albeit a little while ago, so summon all your Muggle intelligence.  Today's topic is:

Harry Potter Trivia

What secret name do Harry, Ron and Hermione use to refer to Sirius Black?

Email your answer to before next Wednesday.  If you're the first correct answer, you will win:

A 10-pack of Verbatim high-speed CD-RW discs!  (700mb/80min, slim case)

Good Luck!

The correct answer to last week's question is:  a hot beverage