A trigak was an 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)