Catchphrases and concepts that spread from person to person are known as memes, which, courtesy the Internet, can now explode across the Earth like a highly contagious virus (hence "going viral"). As with their real-life counterparts, some infectious diseases are global (pandemic), while others a...

TL;DR - Winter Bash is a fun event, that starts every year in the middle of December, usually between Hanukkah and Christmas, and lasts until the end of that year, for about 2 weeks. During this event, users are given "hats" for doing certain actions on the sites (hats are per site, like badges...

According to the video, it started in the Stack Exchange offices, where they had a tradition to hand out special hats to acknowledge outstanding work, initially to reward developers for fixing bugs and shipping features. And then it spread: community managers get hats for answers on meta tha...