A pejorative (also called a derogatory term, a term of abuse, or 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 as criticism, hostility, disregard or disrespect. A term can be regarded as pejorative in some social or cultural groups but not in others. Sometimes, a term may begin as a 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 the majority to be inferior or lower in social class, as a group label with a disparaging meaning.
According to the Online Etymology Dictionary, the word pejorative is derived from a Late Latin past participle stem of peiorare, meaning "to make worse", from peior "worse".
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" or "dude".