Minnesotan Pulls Off Approval for NSFW License Plate It isn't often an inappropriate custom license plate slips past the Minnesota Department of Public and Traffic Safety, but when it does it tends to make the rounds online. That's the case with this custom license plate that was shared on Facebook this week. I have a friend with the nickname Moose, and as I was scrolling through my newsfeed I saw he was tagged in a photo of a custom plate. Upon further inspection of the post, I understood why. The picture he got tagged in featured a Minnesota Critical Habitat license plate with a moose on it, with the plate letters "KNCKLE". The combo of the image and the words made up "moose knuckle".