What is it chrismas merr chrismas?

As an AI language model, I am not quite sure what you meant with "it chrismas merr chrismas". However, I will assume that you are referring to Christmas as a holiday. Christmas is a major holiday celebrated on December 25th, primarily by Christians around the world. It marks the birth of Jesus Christ and is typically accompanied by religious services, feasting, gift-giving, and other traditions such as decorating evergreen trees and hanging stockings. In many countries, it is also a time for family gatherings and special cultural traditions like caroling and gift exchanges. Overall, the holiday is meant to bring joy, warmth, and goodwill to people and communities everywhere.