half blood prince 

Some1 who invented spells at hogwarts, killed dumbledore and was called Snape

Person1: Snape is the Half-blood prince
Person2: Rally? Y U Tell Me! >.<
Person1: cos u didnt know he kills dumbldore!
person2: ARGGGG! the plot is ruined!

half blood prince by 1AM1337 August 9, 2005

half-blood prince book 

A textbook (usually old) with lots of very helpful writing on the inside of it.

The name comes from the sixth Harry Potter novel/movie.

Joe: whoa, look at my copy of Hamlet, it explains what they're saying!
Bob: looks like you've got a half-blood prince book

half-blood prince book by mrbattleman December 1, 2010

Harry Potter And The Half Blood Prince 

This is a great 6th book in which Severus Snape kills Dumbledore, on page 606, go ahead and read, great book, oh yeah, and dumbledore dies, snape kills him.

Harry: Hagrid..Snape..killed Dumbledore
Hagrid: Wha' Harry?

Harry Potter And The Half Blood Prince by Reaperus August 6, 2005

Harry Potter And The Half Blood Prince 

Harry Potter And The Half Blood Prince is the book in which Dumbledore dies and the wizarding world comes to an end as we know it.

Harry Pottter Fans *reads Harry Potter And The Half Blood Prince*
Dumbledore *dies*
Harry Potter Fans *omg*

Harry Potter And The Half Blood Prince by goofuffle May 28, 2006