First seen on Tumblr and Imgur, this term refers to Matthew Lewis's battle and victory over puberty.
"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."
origin- English- after the character Neville Longbottom from the popular Harry Potter series by British author J.K. Rowling
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.
Mary Neville Longbottomed and now she can't tell who is her friend and who just wants to sleep with her.