Yak
From YTMND
Yak is a fad that has started quite recently. It involes photoshopping a picture of a yak onto random things, such as a sun, often with NES music. It all started when anono created a site called Solar Yak. It didn't really make any sense at the time, but he created a site explaining it about an hour later called Making an Average YTMND, and then followed it up with Making a YTMND Paradox.
Now more and more Yak sites are being made, some are based on the original Solar Yak YTMND and others are different.
Some examples: