"Festivus for the rest of us" is a phrase that refers to a holiday popularized in a hilarious 1997 Seinfeld episode of the same name. The holiday is celebrated on December 23rd as an alternative to Christmas and is characterized by:

Decorating with a metal pole: Instead of a Christmas tree, a plain metal pole is decorated as a Festivus tree. (George’s Dad, Frank Costanza, explains that he finds tinsel distracting.)