The "XviD-Jiggly" part of the keyword refers to the video codec and potentially the encoding settings used for the video. XviD is an open-source video codec that allows for efficient compression and decompression of video files, making it suitable for distributing video content over the internet.
During the 2000s, the "Scene" (an underground network of release groups) followed strict naming conventions. A title like Spiderman.Parody.DVDRip.XviD-Jiggly Spiderman A XXX Porn Parody XXX DVDRip XviD-Jiggly