Fristmas or 'Fake-Christmas' includes the regular Christmas day festivities (presents, full xmas dinner, lots of drinking, Xmas movies and frolics) the only difference being it is strictly friends invited.
Fristmas usually happens a week or so before everyone has to return to traditional family Xmas obligations.
Fristmas originated when a student in halls decided to do a full Christmas dinner for her 10 housemates and friends in 2007 (in Student 'oven' microwaves) and has happened every year since.
'Sweet, bring some crackers. I bought a Turkey'