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A freak out by a Harry Potter fanatic every time they see or hear anything related to Harry Potter.
Usually means "Oh my f---ing Harry Potter!"
*turns on TV*
*A random Harry Potter commercial is on*
Fan: "OMFHP!! OMFHP!! OMFHP!!"

"Who here has read Harry Potter?"
"OMFHP! OMFHP! OMFHP!"
by Phoenix Tears February 10, 2010
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