American Dad Wikia

The Onatiub Twins are the "muscle" that Roger hires in his plot to help Stan steal a painting of Francine's vagina from the Langley Falls Museum of Art in "Portrait of Francine's Genitals".

Roger details their backstory as weighing 700 pounds combined and grew up eating raw horse meat, which they still enjoy.

When the gang's Paypal payment from Roger is refused, they set off the fire alarm and leave.