"Mudblood" is a derogatory term used in the Harry Potter series to describe wizards and witches who are born to non-magical parents, also known as Muggles. The term reflects a prejudiced view held by some pure-blood families, who believe that magical ability should only come from a lineage of magical ancestry. In the series, characters like Hermione Granger face discrimination for being a Mudblood, highlighting themes of prejudice and social inequality. The term serves to illustrate the conflict between different factions within the wizarding world, particularly between those who value blood purity and those who embrace diversity.