I'll show you a video, let's see if you can guess!
Yes! It is a mass gathering of people dressed in Santa Claus costumes, hundreds and hundreds of Santas determined to celebrate the holiday season and have fun. It all started in San Francisco in 1994 and since then it has spread to over forty countries.
They even have their official site with information about dates and locations!
Just click on Santa to visit it.
(Your own city might be in the list, who knows?)
Sounds like fun, doesn't it?
The problem is, though, that all those Santas are usually much too thirsty. They fill the nearby bars and pubs and often end up quarrelling and originating rows (believe it or not!).
This video shows some of the people gathered at SantaCon in New York in 2,012.
This is the "wish list" of some neighbours to Santa:
I'd love to read your comments!