A neologism that combines "dhimmi" and "Democrat". A dhimmi is a non-Muslim who, accordingly, has a distinctly second-class status under Muslim law. A secondary meaning refers to non-Muslims, i.e., Westerners, who refuse to resist Islamist hegemony and, in a sense, prefer dhimmi status. The intent of the neologism, whether correct or flagrantly incorrect, is to accuse Democrats of wanting to turn Americans into dhimmis.
Biden, Boxer, Dodd, Durbin, Feingold, Kerry, Leahy, Schumer... They all side with the terrorists. They're all just Dhimmicrats.