Definition of "gorillian"

Barton was gorillian of build, all of it muscle, and Churchillian of jaw, all of it stubborn, but for all that amazingly good at not trampling over the authority of village elders.

1998, Dana Stabenow, Fire and Ice, page 77

[…] the voices of animals begin to open to the dramaturgical. The gorilla's visual (chest pounding) and auditory (roaring) gestures are simultaneously posturing and actions, creating the aura that is distinctively gorillian.

2012, Don Ihde, Listening and Voice: Phenomenologies of Sound, Second Edition