What does "All-American City" or "All-American Town" mean?

That's kind of hard to answer, but I'll try... the term "All-American" is used to describe anything that exemplifies the American ideal. So an All-American city would probably be a mid-sized, kind of sleepy city with a Town Hall, and flower beds up and down Main Street. Everyone would know everyone else and look out for each other, and no one would have to lock their doors. (So basically, we want our cities to be more Canadian. HAHAHA) It's also a kind of generic term we use to describe any small midwestern city. The anti-"All-American" town is probably the normal American city... lol. An All-American sportsman is usually the one of the best at the high school or college level. Some corporations sponsor All-American camps every year, and you must be invited in order to attend. Hope that helps.