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When a non-attractive person goes through puberty and becomes very attractive as a result.

First seen on Tumblr and Imgur, this term refers to Matthew Lewis's battle and victory over puberty.
"Have you seen Lisa since grade school?"
"No I have not, she really Neville Longbottomed. Damn."

"I was staying at my friend's house when her brother who I haven't seen in years walks in to say hello. I was in shock, as he Neville Longbottomed."
by Jamie McCrimmon August 22, 2013
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Oct 3 Word of the Day
I couldn’t care less (but one must keep up appearances, right?)
Frenemy has a family tragedy. "Thoughts and prayers."
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(verb)- made to believe that a person or character is unattractive, and then to find out they are the hottest thing on two feet,

origin- English- after the character Neville Longbottom from the popular Harry Potter series by British author J.K. Rowling
That show Neville Longbottomed us in season two. The main character turned so hot!
by whatnow35 December 14, 2013
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The term used to describe when someone who is not exactly attractive suddenly goes through puberty and becomes hot.
Man, Hiccup really Neville-Longbottomed everyone iin How to Train Your Dragon 2.
by The real deal 7125 February 11, 2017
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In the popular film franchise Harry Potter , Neville longbottom goes from being a slightly geeky , chubby child to a fit as fuck adult. Similar to a glo up, if someone has Neville longbottomed they have gotten significantly hotter
"Have you seen Tom recently? He's so hot now!"
"I know, he's seriously Neville Longbottomed!"
by Ginjasaaa May 30, 2017
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When a character, despite being intelligent, brave, talented, or an otherwise stalwart and loyal friend is dismissed by fans until they become more attractive, at which point everyone pays attention to how hot they became.

refers to Neville Lognbottom, a character from JK Rowling's Harry Potter series, who was generally unpopular until the actor portraying him (Matthew Lewis) became attractive in time for the film adaptations of the final book.
Jeff has many interests that nobody cared about before he Neville Longbottomed, they still don't care but at least he's attractive.

Mary Neville Longbottomed and now she can't tell who is her friend and who just wants to sleep with her.
by those guys you don't know September 16, 2013
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when an ugly person (usually a character with a recurring role in a series) passes puberty and becomes really good looking
have you seen Joseph Gordon-Levitt lately?
he totally neville longbottomed
by harrypotterland July 24, 2013
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