The "redefinition" of what some people view as "holidays" as being null and void. This is one way to defeat the excesses of the so-called Holiday Season. Note: Nolidays are the "non-holiday" days in the series of holidays of the fall season heading toward winter. Nulidays are the invalidation of many of the "traditional" holidays to the point of summing sameness as all others.
We only celebrate Festivus, the rest are nothing but Nulidays, null and void, arbitrary and irrelevant mostly.