Moaning Myrtle is a term used most commonly in South West England for a teenage girl who has multiple sexual partners. It originates from the Harry Potter series and is called so as a moaning myrtle moans during intercourse
"I wish that moaning myrtle would shut up it's half past 2 and she's still out on the street
by Sara is short November 7, 2005
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The ghostly girl that likes Harry Potter in the second and fourth books. She haunts one of the girls bathrooms at Hogwarts. She helps Harry and Ron find the chamber of secrets, and also helps Harry open the egg.
by Testes101 April 14, 2009
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A whorish girl in Harry Potter who repeatedly attempts to suck harry off. Characteristics include standard emo behaviour such as excessive crying and whining. Also displays various voyeurous acts.

Got her name from.........ahem...you guess XD
Moaning myrtle watched harry potters body float through the water like a gas infested turd.

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Perfect nickname for your wife or girlfriend that is trying to speak while you are choke-fucking her during a Harry Potter movie.
Sorry Moaning Myrtle, but I can’t understand a single word you are saying.
by Mancave Movie Madness May 30, 2017
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When you moan in class and it turns your teacher on until the point of no return
Holy crap I'm about to have a Moaning Myrtle!
by Matt-Morgan9000 January 10, 2017
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When you moan in class and your teacher gets turned on until the point of no return
I'm about to pull a Moaning Myrtle right now.
by Matt-Morgan9000 January 10, 2017
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The exceptionally irritating and creepy ghost girl from Harry Potter, who in the films was actually played by Daniel Radcliff in drag.
Moaning Myrtle is probably NOT hiding in your toilet right now but you should probably check anyway
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