HBP

From Fandom wank wiki

Harry Potter and the Half-Blood Prince, the sixth book in the Harry Potter series. Credited with sinking the Harry/Hermione ship, though the pairings should not have come as a surprise. Unless they should have. Nobody really knows for sure except JKR, and she's probably lying. The bitch.

Not to be confused with FPB, who will totally cut you if you keep talkin' 'bout his mama like that.