What's the difference between "Ops Dev" and "DevOps"?
I've never seen ops dev used before this post.  Searching around I see things like this article that has it in the title but nowhere in the article.  Then there's this article from 2015:


  So in this way, when “OpsDev” happens, IT ops teams are helping developers do their jobs, but developers are also architecting applications with IT ops in mind, helping them utilize resources better. The days of developers simply creating applications and “throwing them over the fence” to testers and IT ops teams are over.


which seems to define OpsDev as "development in a company that practices DevOps" (or more cynically, "development done correctly").

Finally, there's https://dzone.com/articles/opsdev-is-coming :


  What Is OpsDev?
  OpsDev means that the dependencies of the various application components must be understood and modeled first before the development process begins. In addition, the consideration for infrastructure stability, environment modeling, security and audit/compliance measures are first and foremost. Application components are stubs and they do not need to be in their final forms. Secondly, the environments in which the components will be deployed for production must be modeled. Thirdly, the processes to deploy the various components to the target environments must be automated as much as possible.


Again, this sounds to me just like normal, modern development.

DevOps is a problematic term because it has many different definitions.  OpsDev, on the other hand, appears to have essentially no definitions.  From a personal perspective, I would mentally substitute "development" for every instance of "OpsDev" and ignore the term; it appears to be just another instance of people inventing new terminology to describe old concepts so that they sound more exciting.