Someone has messed up the Project Bitcoin on Sourceforge too...

http://sourceforge.net/projects/bitcoin/

Buttcoin is a peer-to-peer butt. - WTF ?

What the f***??

He's also redirected the "bitcoin web site" to buttcoin.org.

Is it NSFW?

Lol no. It's just that reddit troll community, /r/buttcoin's creation.