The major event that occurs in Harry Potter and the Half-Blood Prince. Before many fans were able to finish the book, it was spread all over the internet, and ruined the ending for fans all over.

It is also a fad on ytmnd. Many pages were created with this information, sometimes in humorous ways.
<Dude1> Hey, did you know what Snape kills Dumbledore?
<Dude2> What the hell?! I haven't read it yet!!

<Dude In Car> Hey! Snape kills Dumbledore.
<Girl> Nooooooo! You bitch! YOU BITCH!!!
by Chris337 October 12, 2005
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The major internet fad of 2005. Spawned off many ytmnd sites. Its two mediums where pictures and video:

Someone got ahold of Harry Potter and the Half-Blood Prince before it was supposed to be released to the public and scanned pages 596, 597, and 606 to prove that Snape killed Dumbledore. The pictures spread like wildfire and ruined many Harry Potter fan's lives.

Video: Someone videotaped(poorly I might add) himself driving past a crowded bookstore at 1am and shouting "Snape kills Dumbledore!" at all the Harry Potter fans outside, ruining the story for them.
1: d00d have u read t3h harry pott3r yet

Driver: Hey! Snape kills Dumbledore!
Girl: Ooooooooooh you bitch! Bitch!
by inbe July 31, 2005
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An expression inspired by the 2005 internet fad around the Harry Potter and the Half-Blood prince in which the character Snape kills Dumbledore.

"Snape killed Dumbledore" is closest in meaning to shit happens or I don't give a shit and is is used as an unsympathetic comeback, similar to Jesus wept.
Guy 1: "Balls. I just failed another Calc test. Another, and I'll fail the class."
Guy 2: "Snape killed Dumbledore, you know? You always complain about failing classes, why don't you study for once?"
by Ben Dover! May 21, 2006
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