heart is in mouth

somebody's heart is in their mouth

if someone's heart is in their mouth, they feel extremely nervous My heart was in my mouth as I walked onto the stage.

Name	Pronounced	Usage
Bjarke	-	Danish
Aristaeus	ar-is-TEE-əs (English)	Greek Mythology (Latinized)
Gracja	GRATS-yah	Polish
Millicent	['milisnt]
Gertrudes	-	Portuguese
Hai	-	Chinese