Made of 100% Cotton; It's Sales are 99% Ironic
washingtonpost.com
washingtonpost.com
It seems most of these memes originate or are popularized on relatively geeky web forums (4Chan, Reddit, eBaum's, SA, etc), where they propagate among those forums' readers -- the sort of geeky people that spend their time on web forums. After a while a meme reaches critical mass and spills over into popular culture, and the geeky early-adopters have to listen to the meme they helped spread all over again.
http://www.birkoph.com/Wolf_tshirt.htm
"Born to Bone" more like it.
Current offender: "Right Round" by Flo Rida.
The ability to imply one meaning by saying its opposite is definitely part of the verbal toolkit that I'd have problems living without.