A trigak (or tlhIghaq) was a predatory animal native to a world in the Klingon Empire.
General Navok described the derelict mining facility on Tiranax as "a piece of trigak droppings". (TOS - Mere Anarchy eBook: The Blood-Dimmed Tide)
Trigak was also eaten by Klingons. IKS Gorkon crewmember, Lieutenant Toq, once ate some trigak which he covered in grapok sauce. (GKN novel: Enemy Territory)