Kimmy Granger is a well-known figure in the adult entertainment industry, active primarily in the mid-to-late 2010s.
Given how search algorithms work on adult aggregator sites, the first definition—a —is the most plausible.
The term “cooch” is a slang, often playful or vulgar, reference to female genitalia. When combined with “couch,” it typically refers to a specific setting and camera framing popular in adult scenes: