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1.
HBP
Shortening of "Harry Potter and The Half-Blood Prince".
Oh! I can't wait until HBP comes out! *dances around*
by Mr. Nozzers June 19, 2005
 
2.
HBP
Stands for Half-Blood Prince, the sixth Harry Potter book.
I just wrote a HBP based fanfic!
by Melena S. December 16, 2007
 
3.
HBP
Det sixth book in Harry Potter.
HBP is soo kewl! JKR know what to do!
by Something else March 29, 2005
 
4.
HBP
Humanoid Butt-Plug (n). A person who either stops dead or moves at near-tectonic speeds through the only way into or out of a place that you need to get into or out of fast.
"Damn man, that tourist turned into an HBP when he couldn't figure out how to use his metro card to work in the only working turnstile. I must have missed four trains."
by Count Zero April 24, 2005