someone's heart sinks

US /ˈsʌm.wʌnz hɑːrt sɪŋks/
UK /ˈsʌm.wʌnz hɑːrt sɪŋks/
"someone's heart sinks" picture
1.

if someone's heart sinks, they feel disappointed or sad

:
When I saw the long queue, my heart sank.
Her heart sank when she realized she had lost her passport.