A shock site is a website that is intended to be offensive or disturbing to its viewers, though it can also contain elements of humor or evoke sexual arousal. Wikipedia

Deliberately offensive website Wikipedia Disambiguation

Website intended to offend and disgust its viewers Wikidata

A website intended to offend or shock, containing frightening and/or distasteful content of a pornographic, scatological, or grotesquely violent nature. In most cases, it displays a particular picture most prominently; some shock sites also show animations or image galleries. Wiktionary

Offensive website. Wiktionary (translation)