There is no way to impose tariffs on Danish goods. We're part of the EU, and the inner market, so we'll just send the goods from some other EU country. So any tariff on Denmark would have to be a tariff on EU.
The US national anthem. People will stand around before sporting events knowing that they used to do something but are mystified they can't remember what.
The problem is that we can put words together to form new words. So say I produced a yogurt at a lake(sø) , I could call it søyougurt. It's not a word that would be in a dictionary though, but lots of that kind of words aren't.
There is no way to impose tariffs on Danish goods. We're part of the EU, and the inner market, so we'll just send the goods from some other EU country. So any tariff on Denmark would have to be a tariff on EU.