Put too much effort into agreement with a lot of extremely meagre content

Usage examples of overthink.

I also know that you tend to overthink decisions-especially ones you deem important.

So s/he reasonedcorrectly, it seemedthat Selar would spend so much time overthinking and analyzing the situation that she would be vulnerable to attacks that bordered on the arbitrary.

So s/he reasoned—correctly, it seemed—that Selar would spend so much time overthinking and analyzing the situation that she would be vulnerable to attacks that bordered on the arbitrary.

As long as I didn't overthink the matter, I could take solace in the twin notions that I had simply acted in accordance with the whims of the divine and fate, and that I might actually be making the world a better place while doing it.

The way things were going, it didn't pay to overthink anything these days.

Of course, it could just be something straightforward and simple and we’re overthinking it.

It's kind of like overthinking someone—you would have to be a telepath to truly understand.