-ster

plural -sters

1. Someone who is, or who is associated with, or who does something specified.
2. humorousoffensivesometimesA diminutive appended to a person's name.

   “Never better,” the Raabster spat back. “Just get on with it. What’s the score?”

   2023 April 21, John Crace, “Psycho goes down raging: the liberal wokerati finally get to Raab”, in The Guardian, →ISSN, archived from the original on 13 May 2023

   1 more example

   1992, Russell Baker, "Observer; Pretty Good Read" (review of What It Takes by Richard Ben Cramer), New York Times, 25 Jul., Cramer's exploration of the hearts, minds and souls of America's ambition-crazed Presidential candidates moves ahead at a pace that feels childishly frantic . . . . This is not just because it keeps referring to Senator Robert Dole as "the Bobster."