Santa, snowmen, Secret Santa and the midnight countdown. Category shown to the imposter: Something from Christmas or New Year.
Play with this packFree, in your browser. One phone or many.In the game: tap the button above. Bahurupiya picks a word from this pack, shows it to every player except the imposter, and keeps score.
With paper slips: pick a word, for example Elf. Write it on every slip except one, where you write "Something from Christmas or New Year". Everyone draws a slip, then take turns saying one word that hints at it. Vote on who had the odd slip.
For dumb charades or guessing games: the same list works. Star on the Tree is a good one to act out.