someone's heart is in their mouth

US /ˈsʌm.wʌnz hɑːrt ɪz ɪn ðer maʊθ/
UK /ˈsʌm.wʌnz hɑːrt ɪz ɪn ðer maʊθ/
"someone's heart is in their mouth" picture
1.

avere il cuore in gola, sentirsi molto spaventato

to feel very nervous or frightened

:
When the roller coaster started, my heart was in my mouth.
Quando le montagne russe sono partite, avevo il cuore in gola.
Her heart was in her mouth as she waited for the exam results.
Aveva il cuore in gola mentre aspettava i risultati dell'esame.