The word mutt may be used to describe a person of multiracial descent. It usually refers to people whose lineage contains more than one ethnic group (e.g. half-African and half-Caucasian), but may also be used to describe individuals whose ancestors come from a variety of cultures, even if they share the same race (e.g. half-Swedish, half-Czech). The word is used colloquially, not scientifically, and stems from the word mutt being a synonym for mixed-breed dog. A mixed-race Asian / Caucasian boy The terms multiracial, biracial, and mixed-race describe people whose ancestors are not of a single race. ... The term race distinguishes a population of humans from other populations. ... A colloquialism is an informal expression, that is, an expression not used in formal speech or writing. ... For the scientific journal named Science, see Science (journal). ... This small dog of unknown parentage may be part Chihuahua or Miniature Pinscher. ...

When used to describe a person, mutt is not generally considered a pejorative, but could be depending on the context and tone. Look up pejorative in Wiktionary, the free dictionary. ...