Liebercrat noun1 •(US, slang) A Democrat whose politics resemble those of Joseph Lieberman; in recent use, often specifically a Democrat who acts like a RepublicanAs result, Mr. Lambert is being called a "Liebercrat" after Sen. Joe Lieberman, of Connecticut, who won re-election as an independent after losing in the 2006 Democratic primary to Ned Lamont. — 2007 formsLiebercrats