not miss much
not miss muchand not miss a thing
1. Inf. not to miss observing any part of what is going on. (Usually with do as in the examples.) Ted doesn't miss much. He is very alert. The puppy doesn't miss a thing. He sees every move you make.
2. Inf. not to miss experiencing something that really was not worth experiencing anyway. (Usually with do as in the examples.) I missed the big sales meeting last week, but I understand I didn't miss much. Bill: I didn't see that new movie that is showing at the theater. Tom: You didn't miss much; it was pretty bad.