I found the perfect example of keyword stuffing, while reading Matt Cutts blog. Look at the highlighted area in the image below
It was filled with all kinds of unrelated keywords
We can only imagine what is a tupac kazaa hospital, alient cemetery or a internal vaginal aphrodisia doping hardware.
Of course the domain is banned from Google, and the owner has an interesting spin on why he is banned
The comments on Matt's blog post are hilarious. Check them out here.