from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One who agrees with an idea mindlessly, especially those who agree because they are supporters of the person who started the idea.
- n. Someone who is a fan of Rush Limbaugh's radio program.
- n. A person who agrees with Rush Limbaugh unquestioningly.
ditto + -head, coined by listeners of Rush Limbaugh's radio show, from the habit of calling in with the single-word comment "Ditto!" (Wiktionary)