It's a skit from the Seinfeld TV Show. Was Celebrated by the Costanza family. Instead of giving gifts they would tell thier grievences against others that have wronged them and perform feats ot strength. Festivus for the rest of us. Was a pretty funny on-going thing on the show.
Ccheese, you never saw Monty Python's Flying Circus show. Oh man,, I love the two men watching other men falling by the window and betting who would be next, skit. The show was put together by british comedians. Some members were, John Cleese and Eric Idle.