It means you haven't decided which choice to make. It comes from the idea of literally being on a fence, and needing to decide on which side you should jump off.
23 de enero de 2015
1
3
2
It means to be undecided, you don't want to or you cannot make a decision if you want to come or not.
23 de enero de 2015
1
2
¿No has encontrado las respuestas?
¡Escribe tus preguntas y deja que los hablantes nativos te ayuden!