PARIS: Not that the person who actually wins will even know who Hubert Humphrey is, but hey, I bet they’ll organize one boffo senior ditch day.
Ditch Day, previously discussed.
Boffo, US slang meaning “very good”. It originated from the film trade magazine, Variety.
Note that Paris is wearing one of the 400 campaign buttons that Lorelai made for them, showing Rory’s and Paris’ faces, against what looks like the US flag (as if it’s a real presidential election, not just one for school).
The Annotated Gilmore Girls 