Skibidi Toilet, as a species, can basically be any character with their head sticking out of a toilet bowl, of which the toilet is their body. It may also include attachments like weapons (and other things idk I’m not up to date on the skibidi lore).
Locomotion is not often facilitated by legs, rather by flying, sliding, or scooting.
Pre-existing characters can become a hybrid by simply replacing their body with a toilet and attaching their head through the toilet bowl.

It originates from a series by the same name, Skibidi Toilet.