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2 definitions by MrBattleMan

The unoffical name of the employees at the 2010 Vancouver Olympic games because of the bright blue clothes they have to wear that are the same color as smurfs.
Jeff: I'm stoked to go work at the olympics!
Brian: Have fun you smurf.
by MrBattleMan February 16, 2010
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
by mrbattleman November 28, 2010