A pejorative (also called a derogatory term, a slur, a term of disparagement) is a word or grammatical form expressing a negative connotation or a low opinion of someone or something, showing a lack of respect for someone or something. It is also used to express criticism, hostility, or disregard. Sometimes, a term is regarded as pejorative in some social or ethnic groups but not in others, or may be originally pejorative and eventually be adopted in a non-pejorative sense (or vice versa) in some or all contexts.
Name slurs can also involve an insulting or disparaging innuendo, rather than being a direct pejorative. In some cases, a person's name can be redefined with an unpleasant or insulting meaning, or be applied to a group of people considered by anyone to be inferior or lower in social class, as a group label with a disparaging meaning.
When a term begins as pejorative and eventually is adopted in a non-pejorative sense, this is called "melioration" in historical linguistics. It may also be called amelioration, reclaiming, or semantic change. Some examples of melioration are "punk", "dude" and "nerd".
Linguistic reclamation, also known as linguistic resignification or reappropriation, refers to the appropriation of a pejorative epithet by its target(s).