Get butterflies in their stomachs - Idioms by The Free Dictionary
get butterflies in (one's) stomach (redirected from get butterflies in their stomachs)
get butterflies in (one's) stomach
To have a feeling of nervousness, often before a performance or undertaking of some kind. I always get butterflies in my stomach before I go on stage and perform.
get/have ˈbutterflies (in your stomach) (informal) get/have a nervous feeling in your stomach before doing something: I always get butterflies (in my stomach) before an interview.