throw over

throw over (third-person singular simple present throws over, present participle throwing over, simple past threw over, past participle thrown over)

1. (transitive) To end a romantic/sexual relationship with.
   • 1901, H G Wells, Mr Skelmersdale in Fairyland

     The girl he was engaged to at Clapton Hill tried to get it out of him, and threw him over partly because he refused, and partly because, as she said, he fairly gave her the "'ump."

2. (transitive) To discard or give up (a plan or project, etc.).
   • 1909, Transactions of the Minnesota State Horticultural Society

     I failed to strike anything of any benefit at all, and I became entirely disgusted and threw the whole thing over.

• (discard): abandon, give up
• (end relationship): break up with, dump

• overthrow