A "simmering feud" refers to a long-standing disagreement or conflict between two or more parties that is slowly brewing or intensifying, but has not yet reached a boiling point. Full definition
At the root of this flurry of reforms is a long simmering feud between the Mahoney administration and County Comptroller Bob Antonacci. (wrvo.org)
A long - simmering feud over direction of the minor party has been gaining steam in a fight that analysts say echoed the national Democratic divide in 2016 over Hillary Clinton and Bernie Sanders. (newsday.com)
Long simmering feuds, complex sibling relationships, overbearing parents and underwhelming offspring usually don't make for harmonious compositions. (heikemoras.com)