The Skibidi Toilet are the "Skibidi Toilet" series main antagonists, which consist of toilets that have human heads with very stretchable necks in the part where you are supposed to pee in them, gross. They're unable to talk and the only sound they can produce is the lyrics of a song, that goes "Brrr, Skibidi dop dop dop yes yes, Skibidi w, YIII YIII" which can have variations.
They mainly use their neck to attack via biting or just hitting with their necks.