Dittohead

A dittohead is a person that likes but does not necessarily agree with the Rush Limbaugh show. As faithful listeners to the show know, it is a mistake to think that 'ditto' means that the caller agrees with Rush Limbaugh's opinions.

Saying "dittos" (or even "mega-dittos") was started by Rush Limbaugh as a shorthand way for callers to say they liked the show and to save time.