A friend who is way too much of a social butterfly--knows a lot of peeps and is constantly stopping for quick heart-to-hearts with everyone they run into (this is annoying when you want their complete attention or you are trying to get somewhere on time)
People use "the mayor" instead of "cool" or "rocks". My friends brother started saying it, and now lots of people have started using that expression. The opposite of "the mayor" would be "the janitor" which we use also.
"That party last night was the mayor!" ex for "the janitor"...."school is the janitor."