sb's heart is in his/her mouth
If someone's heart is in their mouth, they are feeling extremely nervous:
My heart was in my mouth when I opened the letter.
Thesaurus: synonyms and related words
Anxious and worried
- (all) hot and bothered idiom
- -racked
- a bundle of nerves idiom
- aflutter
- agitate
- alarmed
- anxious
- apprehensive
- demented
- dread
- fuss
- get in a sweat idiom
- grim
- harassed
- haunted
- prey on sb's mind idiom
- prey on sth
- rattled
- rest easy idiom
- restive
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