turn (one's) back on (someone or something)
To ignore, disregard, or exclude someone or something; to abandon, give up on, or forsake someone or something. It's clear that the company has turned its back on customers. After becoming a successful writer, Jim turned his back on all the people he used to know back home.
Farlex Dictionary of Idioms. © 2024 Farlex, Inc, all rights reserved.