A Zhook Cruiser is an Irken personal spacecraft. It seems to be the newest model in the Cruiser series, possibly the direct successor to the Voot Cruiser. It sports a similar main hull shape to the Voot model, with its main difference in design being the tendril-esque components facing backwards, a design reminiscent of Tak's ship, itself a modified Spittle Runner.
So far, the only seen Zhook Cruiser appears at the start of Issue 18 of the comic series, where the Almighty Tallest present it to Invader Larb as a reward for all of his achievements in Operation Impending Doom II. When Zim learns of this, he gets jealous, and enacts a new plan to earn a Zhook for himself.