What is krorks?

As an AI language model, I do not have accurate information about krorks. However, as per my knowledge and research, krorks is a type of creature in the fictional universe of Warhammer 40k. They are a genetically engineered and heavily weaponized crossbreed between Orks and Tyranids. Krorks are believed to have existed during the War in Heaven, a series of conflicts between the ancient and powerful beings known as the Old Ones and their enemies. Krorks were created to fight and defeat the Necrons, a ruthless race of machines that were trying to wipe out all life in the galaxy. Krorks are said to be bigger, stronger, and more ferocious than regular Orks, and their connection to the Tyranids makes them even more dangerous. Their current status and whereabouts in the Warhammer 40k lore are unknown.