The term 'LONGTIME FEUDER' can be summarized as a five-letter word, 'MCCOY'. The term is derived from the long-running feud between two families in the American West, the Hatfields and the McCoys. The feud began in the late 1800s and lasted for decades, with both sides engaging in acts of violence against each other. The term 'LONGTIME FEUDER' is often used to refer to someone who has been involved in a long-standing dispute or rivalry.