Restricting your diet, a reference to lap-band surgery
I've been eating way too much all weekend, I'm getting fluid in my band this week for sure.
The day that all people (in marching band) look forward to at the beginning of a new season, where the music and movements you will be working on repeatedly for the next few months are revealed.
Guy 1: Man, tomorrow is the marching band show reveal day, aren't you excited?
Guy 2: Of course I am, I bet it will be awesome.