Top Definition
A holiday celebrated by gamers the world over, lasting all of January. You are allowed to give gifts for this celebration but they must be game related and under £10. You can also give out cards. Most importantly however you must play video games until your eyes bleed.
Player 1: 'So, you suck at Tekken 5 this winter-een-mass...'
Player 2: 'Fuck you.'
Both: 'Happy winter-een-mass, jackoff.'
by Ethan March 07, 2005

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