You meant to search forChristmas on this site, but just like what happened to Porb, you made a typo and typed Chirstmas instead. Now you are reading this.
Arkansas christmas cookie is when one person lays in the snow making a snow angel while another person urinates on them. The urine acts as the "sprinkles" on the "angel"
My girlfriend was so excited for the first snow of the year, she laid down in it and started making a snow angel. I used this opportunity to make her a arkansas christmas cookie!