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Initials of Neil Patrick Harris, star of Doogie Howser M.D., used comically by the police officer in the movie "Harold and Kumar Go to White Castle" instead of his full name.
Harold: Do you know the show Doogie Howser, M.D.?
Officer Palumbo: Great show. God I love that show. Doogie.
Harold: Neil Patrick Harris stole my car tonight.
Officer Palumbo: Hey! NPH wouldn't do that!
by looster401 August 05, 2005
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Commonly mistaken as the initials of Neil Patrick Harris, in Harold and Kumar 2 he corrects Harold in saying that The PH actually stands for Poon handler.
Neil:You do know what The PH in NPH stands for right?
Harold: yeah i thought it was Your initials Patrick Harris?
Neil:No, common mistake. it actually stands for Poon Handler.
by Nick 2113 August 12, 2008
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Neil: do you know what the PH stands for in NPH?
Harold: Patrick Harrison?
Nail: no, Poon Handler
by Cody Brinkmann August 14, 2008
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A NPH is when a guy does a line of cocaine off of a naked part of a women’s body. Usually the butt cheek or breast. Stomach can also be used but must be clarified that it was not a true NPH. Bonus points if the girl is a stripper. The NPH is a reference to Neil Patrick Harris’s roll in Harold and Kumar go to White Castle. N.P.H. is the initials of Neil Patrick Harris but the term has this definition because of a scene in the movie where Neil Patrick Harris is with two naked strippers and snorts a line of cocaine off one of their butt cheeks.

Dude I went to Vegas this weekend and hooked up with this hot ass stripper. After a few drinks we ended up back at my hotel room, busted an NPH of her ass and then fucked her till the sun came up!
by Skinnyz August 08, 2008
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NPH is the abbreviation for Nuts Per Hour. It is used to measure how many times you nut within an hour.
"Hey, dude. What is your NPH?"

"Around eight. But I can push for ten"

"Ten, dude?! I can achieve twenty per hour no problem."
by LilTrumpet December 10, 2017
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Abbreviation for Neil's Per Hour, used to describe how many times someone has seen Neil Patrick Harris within a certain period of time.
"Me and Gerjan were watching the Harold and Kumar movies yesterday on TV, and then the new Old Spice commercial came on... clocked us at 3 NPH."

"Bah, we clocked at 6NPH's when we had a Doogie Howser marathon last week."
by KaeXIII August 26, 2008
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