In the "extended" canon (in this case the novel "Honor Bound") there is the so-called {bolmaq}, a native animal of Boreth, which makes a bleating sound and tends to run around in circles.

The word wasn't invented by Marc Okrand himself, but by the author of the novel. I think, however, Okrand vetted the new Klingon words in it.

I used {bolmaq} to describe a sheep once.