Explanations/etymology also appreciated!
For Joe Shmoe, it means a very average or below average person. It’s a derivation of the practice of using “shm-” to dismiss something (eg “Practice shmactice. We’re already perfect”).
And “John Smith” is meant to be the most average name or person imaginable, so they have the “most common” (citation needed) first and last name as well.
Denmark -
Brian <- A name, but also a slur for people considered ‘hillbilly’. Very frequently used against people who drive cheap tuner hatchbacks. Said cars can be referred to as Brian Cars.
Peter Jensen <- Also a name, but it’s become notorious in Jutland because it feels like everyone is immediately related to someone with this exact first and last name.