Squib

A Squib, also known as a wizard-born,Twitter account of J.K. Rowling was a non-magical person who was born to at least one magical parent."Squibs" at Squibs were, in essence, "wizard-born Muggles". They were rare and were looked upon with a degree of disdain by some witches and wizards, particularly pure-bloods. 
Muggle-born witches and wizards were believed to be descended from Squibs who married Muggles, introducing the potential for magical ability into the bloodline, thus a few generations later a wizard would be born to two Muggles.J.K. Rowling and the Live Chat, Bloomsbury.com, 30 July, 2007
==Overview==
A Squib was a human who had at least one magical parent, but did not inherit magic from said parent. A wizard or witch child would typically show signs of magical abilities by seven years old; any child who did not was very likely a Squib, though they were possibly late-bloomers.
Squibs were rare, even just one being born into a family was unusual. This is why the case of Thaddeus Thurkell's seven Squib sons was particularly noteworthy.
Squibs were incapable of practising magic in any way, as Argus Filch found out when he attempted to use the supplementary course Kwikspell, which was designed to help adult wizards improve inadequate magical skills. His efforts had no effect as he had no magical skills to improve upon.
==History==
In 1858, Angus Buchanan never received a Hogwarts acceptance letter, but got as far as the Sorting Hat before he was exposed as a Squib. In sheer desperation after managing to get into Hogwarts, he threw himself ahead of a girl whose name had been called and placed the Hat upon his head. The horror of the moment when the Hat announced kindly that the boy beneath it was a good-hearted chap, but no wizard, would never be forgotten by those who witnessed it. Angus took off the hat and left the hall with tears streaming down his face. This had never happened before and it never happened since. Angus being a Squib caused him to become estranged from his family.
In 1900, Angus wrote an inspirational book, titled My Life as a Squib. His book helped break the taboos of Squib culture in wizarding society. Angus ended up becoming a star in the Muggle sport of rugby, and his sporting talents became so well known that wizardkind fell in love with his inspirational story, not to mention developing an odd interest in the Scottish rugby team.
While Eugenia Jenkins was Minister for Magic from 1968 to 1975, Squib Rights marches began to surface. However, these marches attracted pure-blood riots.
==Different from Muggles==
In addition to being born into magical families, Squibs differed from Muggles by their knowledge of the wizarding world. They were able to see things that were hidden from the Muggles and use magical objects and creatures. During the 1996–1997 school year, Argus Filch scanned students with a Secrecy Sensor as part of the school's enhanced security measures, and Arabella Figg made a living breeding cats that had been cross bred with Kneazles. Both of these individuals also formed wizarding-like relationships with their cats.Squibs Fact File at 
Squibs were considered different than the Muggle relatives of witches and wizards, who were ordinary people who happened to have some knowledge of the wizarding world— this was because Squibs did have magical blood that wasn't expressed.
==Squib persecution==
Even families that were tolerant of Muggles and Muggle-borns seemed to regard Squibs poorly. The strongly Muggle-supporting Weasley family didn't talk about Molly Weasley's second cousin, who worked in a financial career and was implied to be a squib. Ron Weasley seemed embarrassed to even mention him to Harry Potter, when Harry asked if all of Ron's family were wizards.For this reason, many wizarding families were anxious to see early signs of magical ability and were upset by the prospect that a member might have been a Squib. Neville Longbottom was thought to be a Squib by his relatives, leading his great-uncle Algie to put him in various potentially dangerous situations hoping to "force out some magic" from him. In fact Neville had displayed very early signs of ability that his relative missed, until Algie accidently dropped him out of a window and, fortunately, Neville finally displayed his magic by bouncing into the garden unharmed. However, the wizarding world did set up at least one organisation to support Squibs, called the Society for the Support of Squibs. It was unclear as to Lord Voldemort's attitude towards Squibs. He had personally noted throughout his life that he aimed to purge Muggle-born wizards and witches for "stealing" magic. However, as Argus Filch was allowed to remain in Hogwarts, it is likely they were not prosecuted as blood traitors.Squibs, at times, tried to fight for their rights, as they marched for equality in around 1968 or 1969. However, pure-blood extremists would absolutely refuse to give anything respectful towards Squibs, and even launched an attack against the marchers that led to riots. Even in the 1990s, many years after the protests, the Ministry refused to keep track of Squib births, showing a disregard for Squibs' attempt to earn their rights.
==Known Squibs==
Squib(s) 	Notes
Argus Filch	The caretaker of Hogwarts School of Witchcraft and Wizardry.
==Believed Squibs==
Person(s) 	Notes
Neville Longbottom	Discovered to not be a Squib when his Uncle Algie 'accidentally' dropped him out of a window and he bounced down the road.
===See also===
*Blood status
*Magic genes
==Behind the scenes==
*The term likely comes from the English expression "a damp squib" (dud firecracker), an expected delight that disappoints.
*The word squib also refers to an incomplete or insufficient discharge of a firearm.
*Similarly to the previous instances, "squib" is used for a small explosive, generally used theatrically for pyrotechnic effects, such as simulated bullet hits in films.
*The word could also be a pun on "skip", referring to the fact that the person was "skipped" by magic. In fact, at least one book series (Terry Goodkind's The Sword of Truth) used the word in a meaning analogous to Squib in several books.
*The Star Wars series also uses the term Squib as the name of an alien species.
*Two Squibs (both are minor characters) seen in the series are Arabella Figg and Argus Filch. Both seem to love cats and have the same initials.
*It is unknown what the term would be for the non-magical offspring of a Squib and a Muggle.
*Mafalda, a deleted character, was set to be the child of a possible Squib and a Muggle. However since the character was cut this information has yet to be confirmed."Mafalda (Goblet of Fire)" at J.K. Rowling Official Site (archived here via the Internet Archive's Wayback Machine)
*Although Muggle-borns are descended from Squibs, there is not a single known case of a Squib having children.
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==Notes and references==
Squibs