That's an interesting question, I will just mull over it before I answer. You have given me a lot of things to mull over.

Let me mull it over. I need to mull over my options. Here’s my proposal. Mull it over and get back to me next week.

Hi Anthony, This phrasal means "think about something deeply" or "to ponder something". Ex. I will mull over your suggestions before I make a decision. She needs time to mull over all the available options.

"To mull over" basically means 'to think it through', 'to think it over', 'to think about' something over a long period. I'm giving you these ideas to mull over. I hope you get the gist of it soon.