Throw over is a phrasal verb that can mean to abandon or reject someone or something. There are several synonyms for this phrase, including ditch, jilt, forsake, disregard, and repudiate. To ditch someone is to abandon them, usually unexpectedly or without warning. Jilt is similar, but specifically refers to the act of ending a romantic relationship abruptly. Forsaking someone means to leave them permanently or to renounce support or loyalty. Disregard is to ignore or overlook someone or something, while repudiate is to reject or refuse to accept something or someone. All of these synonyms convey a sense of rejection or abandonment, and can be used in various contexts.