Swan song is an expression used to refer to a final act or performance given by someone before retirement or death. Some synonyms for the term swan song include last hurrah, final bow, farewell performance, final act, dying words, and final fling. Another synonym for this term is final mission, which denotes a final undertaking or a last important task to be accomplished before retirement or death. Others include last words, final words, last gasp, last effort, and final stand. No matter the synonym chosen, they all represent the importance of the finality of a person's actions before the end of a chapter.