1
general::
Phrase(s): cast someone aside [and] cast someone off; cast someone away
Fig. to dispose of someone; to reject or discard someone. • He simply cast his wife aside, and that was it., Phrase(s): cast something aside [and] cast something off; cast something away
to throw something away. • You can’t just cast aside a new coat that you’ve only worn once.
McGrawhill's American Idioms And Phrasal Verbs