Student or Learner
I guess here "pre-prepared meals" mean fast food or junk food. Am I right? If so, I am glad about my guess. Can you think of any other alternatives?
Not necessarily. To me, it signifies "TV dinners", that is, typical dinners that one would make for oneself at home, but factory-made and placed on a plastic plate and frozen - frozen meals. You buy them from your supermarket in the frozen goods area, not from fast food outlets.
But when you say "I guess here "pre-prepared meals" means..." there is no 'here'. You haven't given a context or a link, so you can't use 'here' like that.