Snackmass

Snackmass, a period of time around the festive period when people that can't aford Christmas dinner go to the local corner shop and by a large pile of crappy junk food and eat it all in one day whilst watching shit Christmas films.

Person 1: what are you doing for Christmas? Seeing your family?
Person 2: No I hate my family. And I can't afford my own christmas dinner so I'm just going to do a Snackmass with my girlfriend instead.