Idiom of the day :- Have butterflies in one’s stomach

Usage, examples and definition of the Idiom :-

People who have butterflies in their stomachs are experiencing tension or excitement, usually brought on by anxiety while waiting to do something. This is often shortened to get/have butterflies. ‘I have butterflies in my stomach waiting to go on stage,’ the actress said. ‘I’ve got butterflies,’ the patient said as he was about to go into surgery.