Muggle Born

A Muggle Born is a Witch or Wizard whose parantage has absolutely no magical beings in it. They are usualy selected to enroll in Wizarding schools because of a fair amount of magic that lies inside of them. Non muggleborn witches and wizards (currently all Pure Bloods) sometimes treat muggleborns like vermin. Treatments like this are usualy counted in the wizarding world as a form of racism.