Everything You Need to Know

Nyan Cat is an animated half-cat/half-Pop-Tart flying through the stars with a rainbow shooting out of its butt. Hey, you asked. It's not the first popular animation of a cat, but it became particularly popular after the original animated gif was paired with Momo Momo's version of the "Nyanyanyanyanyanyanya!" song in a mesmerizing and baffling YouTube clip.

Planking, or as it's also called "The Lying Down on Stuff Game," is a very special activity in which people lie face down with their hands at their sides so as to resemble a plank of wood. Also, an important part of the game is to lie down in a place one normally wouldn't lie down. So, you can't plank in, say, a bed. Beer container? Totally fine.

It's Rebecca (Black) Friday! Take a break from shopping with our guide to 2011's biggest internet sensation.