Muggle-born

With a clever mix of compulsion spells and poisons, he rounded up a hundred or so Muggle-born witches and wizards, Mudbloods, and tortured them to an excruciatingly painful death, the likes of which only the Sadist could appreciate in any satisfactory detail.

Not Forgotten. « Love | Peace | Ohana 2007

Snape, like other Slytherins, loves all things Slytherin, but that does not mean that he wouldn't like her because she's Muggle-born, like other

Willa Rubin: Six Speculations About the Seventh Harry Potter 2008

He would have hated Harry's dear friend Hermione, because she was "Muggle-born," meaning, her parents were neither witch nor wizard.

Deanie Mills: Karl Rove's Slytherin Strategy For John McCain 2008

[HBP, pg. 69-70] This shows that not all Slytherins hate Muggle-borns, so it¹s very unlikely that Snape would hate Lily for being Muggle-born, especially being a half-blood himself.

Willa Rubin: Six Speculations About the Seventh Harry Potter 2008

I actually think that there is a psychological basis for a strong dislike of Muggle-born wizards.

The Volokh Conspiracy » Nonideological Evil in the Harry Potter Series: 2007

The motivations of Lucius Malfoy is possibly better understood in terms of class, rather than race: to the old-money Malfoys, Muggle-born wizards represent nouveaux riches, while “blood traitors” such as the Weasleys represent upstart servants who should be kept in their place.

The Volokh Conspiracy » Nonideological Evil in the Harry Potter Series: 2007

The Ministry is determined to root out such usurpers of magical power, and to this end has issued an invitation to every so-called Muggle-born to present themselves for interview by the newly appointed Muggle-born Registration Commission.

The Heirs of Slytherin | Jewschool 2007

Presumably, Muggle-born wizards and others predisposed to treating Muggles well (say the blood traitor Weasleys) would have to be defeated before an open attempt to dominate the Muggles could begin (they are the race traitors or moderate Hutus of the wizarding world).

The Volokh Conspiracy » Nonideological Evil in the Harry Potter Series: 2007

Where no proven wizarding ancestry exists, therefore, the so-called Muggle-born is likely to have obtained magical power by theft or force.

The Heirs of Slytherin | Jewschool 2007

Remember that the initial focus of hostility is not Muggles but Muggle-born wizards, who are not all that different from other Wizards.

The Volokh Conspiracy » Nonideological Evil in the Harry Potter Series: 2007