A fork of Rural Dictionary
To be uninteresting or boring, to the point that you resemble an old man. Used as a noun, verb or adjective. Only a male can Walter, though a female can Agatha.
1. Dude, you're being such a Walter. Why would you want to go bowling? UGH. 2. Look at that Walter over there. He's wearing a tweed jacket! 3. Oh my God, he's dating a sixteen year old? That's not very Walter of him.