Someone who is a boring pest.
A college roommate and I used to call each other "dorkie." We arrived at that word while discussing something regarding the front "door key," a combination of words which we mashed together to form "Dorkie." "Yo, dorkie, where’s the remote?" It was, as my roommate, so aptly put it, a "takes one to know one" kind of insult. Only a dorkie would call another human being a dorkie.
"Nudnik" seems to be of a similar vintage as our concocted word, a humorous term for what it means, and one of an amazing array of English language words referring to stupidity.
I, for one, do not believe that stupidity exists. I believe stupidity is a construct of feeble minds whose hoarding of knowledge creates unease within itself. I know many well-informed people whose knowledge will die with them, for they are not offered enough opportunities to share their knowledge in a way that suits them. Tremendous depths of human understanding are flushed down the toilet simply for lack of opportunity to share that knowledge in a way that communicates disdain for the lesser-informed. I think a principle difference between knowledge today and knowledge 20 years ago is that questions have become stupid. The answer to virtually every possible inquiry is to search for it on the Internet. This ungainly routine puts information aggregators in the position of cultural spokespeople and shapers of knowledge itself. This is a bizarre role for these companies to have arrived at, and one that could never have been predicted 30 years ago. Nevertheless every single day journalists and reporter sources their stories based almost entirely on what comes up tops in a keyword search.
What am I talking about? I thought I was talking about stupidity, and hey maybe I am.