I’m actually looking for the title of a horror short film. It was about 10 minutes long, in color, and 3D animated. I saw it about five years ago on YouTube. It was about a monster who went after kids who sucked their thumbs. But then he went after the stepmother? And it has some silly name.
https://www.youtube.com/watch?v=HwrXoslbdew
https://www.youtube.com/watch?v=ayJ9vo3NeFQ
The plot sounds like Suckablood (though it’s mostly not in color): https://www.youtube.com/watch?v=vJDFzORpOjw