dash (one's) hopes
To undercut one's dreams or optimistic views. I became a lawyer after my parents dashed my hopes of being an artist.
dash someone's hopes
Fig. to ruin someone's hopes; to put an end to someone's dreams or aspirations. Mary dashed my hopes when she said she wouldn't marry me.
dash someone's hopes
Destroy someone's plans, disappoint or disillusion. For example, That fall dashed her hopes of a gold medal. This term uses dash in the sense of "destroy," a usage surviving only in this idiom. [Second half of 1500s]
dash/shatter somebody’s ˈhopes
destroy somebody’s hopes of doing or getting something: Any hopes that the museum would be built this year were dashed yesterday when the council announced its plans to spend less money on the arts.His poor performance in the exam shattered his hopes of becoming a lawyer.