The phrase "shitty unicorn tattoo" seems overly redundant. Obviously, a tattoo of a unicorn is going to turn out badly. But there takes a certain kind of idiot to get...say, a tattoo of a unicorn with a penis instead of a horn. The good folks over at holytaco.com have taken the liberty of compiling a collection of the worst of the worst in a story they dubbed "30 Awesomely Bad Unicorn Tattoos".
Link:
http://www.holytaco.com/30-awesomely-bad-unicorn-tattoos-gallerySample:



(thanks to the lovely Willow for the link)