For many people, St. Patrick's Day has become an excuse to drink things they wouldn't normally drink, eat things they wouldn't normally eat, and dye things they wouldn't normally dye. (If you want an overview of what St. Patrick's Day is like these days, just listen to this old Irish man's swear-filled summation.) That last part—the dyeing—might not seem like the biggest part of St. Patrick's Day, but it's certainly one of the grossest parts, because green dye pretty much always looks unnatural. Just take a look at these examples of green-dyed horror.
1. This river that has discovered the secret of the ooze.
Just because it's a tradition to dye the Chicago River green doesn't mean it looks pleasant.