It's the feeling you get in your stomach when you are nervous. It feels like something (or things) is moving inside your stomach. It is a physical reaction to fear, nervousness and stress. It is not always bad. People who are in love initially say they have butterflies in their stomach when the object of their affection is near. It doesn't last - thank goodness. Think of what it would be like to feel that all through a marriage.

sumsum , I think you took this from a korean ,,,,,,, hhhh by the way it means you are nervous, ( barez )I followed you but i think you wart nagrt bu lagal rezm da