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Half Blood Prince(HBP) is the 6th book in the "Harry Potter" series. It is the second to the last, and by far has made a bigger scene then the previous ones.
Friend 1:Dude i just read Harry Potter book 5
FRiend 2: Well Half BLood PRince is coming out so you can keep your pants on.
by Luke F July 09, 2005
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Jul 12 Word of the Day
The horrible moment when you realise that you have accidentally done something very slightly wrong which has very bad (usually embarassing) implications for you. This is typically the moment of realisation that you just sent a dirty text message to a close member of family, typically your mother, rather than the intended recipient.
Message: "i'm free this afternoon so come over and fuck me senseless, my parents will be out all day"
Recipient: Mum
Message Sent
- Onosecond occurs here -
by Jimmed September 26, 2006
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3
The Half Blood Prince is a former student at Hogwarts who has written his methods in a potions book which falls into the hands of Harry. It teaches him spells such as Sectumsempra, and methods such as the bezoar antidote.
by Davado August 06, 2005
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4
Your member, engorged with blood when you look at the curves of the now-legal Hermione.
Emma Watson gives me a "Half-Blood Prince".
by sxephill July 21, 2009
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5
The Half-Blood Prince (HPB) is:

1) The sixth of seven planned installments in the Harry Potter series of books.
2) A character in the Harry Potter universe.
1) "Hey, have you read Harry Potter and the Half-Blood Prince yet?"

2) "Can you believe (blank) was revealed to be the half-blood prince?"
by TeeveesBella September 01, 2005
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6
A semi-boner; a penis that is engulfed with half of the blood required for a complete erection.
I got this awkward half blood prince during math class today, but luckily it subsided when I concentrated really hard on David the Gnome.
by kduges September 12, 2005
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