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.

قلبه في فمه, يشعر بالخوف الشديد

to feel very nervous or frightened

:
When the roller coaster started, my heart was in my mouth.
عندما بدأت الأفعوانية، كان قلبي في فمي.
Her heart was in her mouth as she waited for the exam results.
كان قلبها في فمها وهي تنتظر نتائج الامتحان.