ytmnd stands for You're The Man Now, Dog.

A little history about YTMND.

Three years ago, someone made a site that had a repeating background image of this guy.



With the phrase "You're The Man Now Dog" in big black fonts and there's a repeating wave file that says exactly that, and it goes on and on. Eventually, there was many copy-cat sites similar to that site, and now the original creator of YTMND started this ytmnd.com stuff to collect all similar sites and links them all in that site. There are some hilarious stuff in there, some inappropriate to link to, but yeah. It's all good.