Debtmas Share definition Flag n. The period after Christmas in which you struggle to pay for Christmas. Hey! What's your family doing for Debtmas this year?I've got us all jobs in a coalmine.Sounds festive! Debtmas by gnostic1 December 25, 2010 0 0 Get merch Get the Debtmas mug. Buy Now — $32.95 See more merch