A Master Bator is somebody who, because of the sheer number of times they have masturbated (choked the chicken, administered corporal punishment to a primate {spanked the monkey}, jacked off, beat off, jerked off, beat their meat, whacked off, played pocket pool, wanked off, etc.), has become an expert at it -- a true master masturbator (or Master Bator).

Works better when written or typed vs. when spoken.