Kulismas (n.) [Kankana-ey] A holiday originally meant for Christians to celebrate the birth of Jesus Christ, but the kids are looking for Santa and the grown-ups are likely to spend money on stuff they don't need just because it was tagged 90% off.
Also, "kulismas" is how my grandma pronounces Christmas.
Example:
Agasem, Kulismas manen... the moment to get liquored up and completely disregard the birth of Christ.