Definition of "feudist"

After two years away, Rosie O’Donnell — actress, Broadway booster, consummate feudist — is returning to the stage.

2007 July 27, Campbell Robertson, “Encores! Season to Feature Some Well-Known Names”, in New York Times‎

[…] our great feudist Sir Thomas Craig

1751, Andrew MacDowall Bankton, An Institute of the Laws of Scotland in Civil Rights