"Crazy XXX 3D World" is a descriptive title for a pornographic video that features a mix of explicit sexual content and 3-dimensional (3D) animation. The term "crazy" suggests that the video may contain unusual or outlandish scenarios, while "XXX" denotes its adult nature. The "3D World" part indicates that the content is presented in a three-dimensional environment, which can be either computer-generated or hand-drawn animations. This tag is designed to attract viewers who are interested in both adult entertainment and advanced visual technology.