Being disloyal is the antonym of being loyal. Disloyalty refers to a lack of loyalty, faithfulness, or commitment to someone or something. It includes betrayal, untrustworthiness, and deceit. Disloyal individuals may breach trust, break promises, or act against the best interests of others. They may switch sides or break alliances for personal gain, backstab friends, or cheat on their partners. Being disloyal can tarnish one's reputation, damage relationships, and hurt those who trusted them. While loyalty is valued in personal and professional relationships, disloyalty can have dire consequences and is generally frowned upon.