There's a social media influencer in Medellin, Colombia named Mauricio Gomez, and he recently got a QR code tattooed on the back of his neck. If you scan it with your phone, it's supposed to take you to his Instagram page.
Supposed to being the key words.
Turns out, the tattoo DOESN'T WORK. It might be because it's faded and blurred, or because his skin stretched, but either way, he now has a huge QR tattoo that won't scan.
Source: News18
Here's a picture.