turn your back on

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.
See also: back, on, turn

turn your back on

1 ignore (someone) by turning away from them. 2 reject or abandon (a person or thing that you were previously involved with).
See also: back, on, turn

turn your ˈback on somebody/something

refuse to help or support somebody who needs it: She turned her back on her family when she became famous.
See also: back, on, somebody, something, turn