I cannot eat too much.
Does this mean I can't eat much food, or it means I can eat lots of food whatsoever?
Thanks a lot.
If it's a very educated person, or a text in formal English writing, it means no amount is too much. If it's your average Joe, or any ordinary person not wishing to sound formal or old-fashioned, it means I don't want to eat very much.
True, unless they were feeling playful.