1. The apparent attractiveness of a nerdy, bookwormy, down to earth girl over a hot babe because of her loyalty, personality, and ability to hang with the guys.
2. Getting turned on by a girl that is smarter than you, specifically in an instance in where she actually proves it.
1.
"I think Sarah, that girl from biology, is way hotter than suzie...but then again, it could be the Hermione Effect."
2.
Guy 1: "Dude, I was so hot for that nerdy girl from math yesterday when she was tutoring me. I mean, the way she spoke about the stuff.... it was so hot."
Guy 2: "Man, that's just the Hermione Effect"
by rubikscube95 August 14, 2011
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Hermione Granger is pretty close to the most clever character in Harry Potter. Behind Dumbledore of course. She is best friends with Harry Potter and Ronald Weasley who she gets out of trouble the whole book series. Hermione has a crush on Ron Weasley throughout the series. She is the smartest witch in her year and the brightest girl to pass through Hogwarts in over a hundred years. Hermione is muggle-born and is described as ugly with large teeth by most people. Hermione is actually really pretty and people don't like her because of how smart she is. Hermione Granger is the best character in the Harry Potter series by far.
What do you think about Hermione Granger
Best Harry Potter Character for sure.
Oh yeah!
*High Five*
by Dreaming Of Hermione Granger December 27, 2011
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That awkward moment that occurs when a group of guys and a girl are talking and the topic of conversation turns to girls and their pros and cons, male health issues or other topics best kept among men. Someone then realises that there is, in fact, a female present. An embarrased silence then follows. This is a Hermione Moment.

It is named after the many scenes in the Harry Potter series when Harry and Ron forget that their friend Hermione is actually a girl.
Steve: Man, Jessica has a nice pair of...
<Dave elbows Steve hard in the ribs>
Steve: er.. Hi Teresa! Um, what do you think of Jessica's... er...
Dave: Dude, Hermione Moment!
by George McBob April 21, 2009
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The brightest witch of her age, and Harry's/Ron's best friend. She has brown bushy hair, rather large front teeth(though she had them shrunk in her fourth year), and is very pretty. Very bookish, and as stated above incredibly smart. Her wand is made of Vine. She is in love with Ron Weasley and marries him in the epilogue of book 7.
Dude, Hermione Granger is so fucking SMART!!!!
by Josh44 April 21, 2008
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dirty hermione is a very risky path. she can either be a freak and leave a snail trail. or decide to go for a swim with the jets on her vagina. but if you are lucky she can cook you a good meal and give you a kiss at night
i heard a dirty hermione can be dangerous to deal with. never know what you will get.
by cocou April 20, 2020
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Doria: "What would you do for a Klondike Bar?"
Me: "I'd french kiss Hermione Granger in front of Ron.
by Yad ecin a evah July 9, 2015
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