Retardo is the name given by pranksters to Frank Garrett's dog that is often heard barking in the background during calls. At the end of one call from the Satanic Racist, Frank exclaims, "Get 'em, Retardo!" He was obviously referring to the caller, but, given the similarity of the phrase, "Get 'em, boy!" it was joked that this was the name of his dog. Whenever the dog is heard barking in the background of a call, Retardo is always pictured as a cross-eyed dog.
Frank has claimed in another call that he does not have a dog, so the dog may in fact be owned by a family member or employee.