extortioner

n.

勒索者，敲诈者；

复数：extortioners

Diversity of timescale promotes the maintenance of extortioners in a spatial prisoner’s dilemma game
Extortioners in East Timor use fake Jesus and Virgin Mary, prosecutor says
THE EXTORTIONERS
Is Gen. Obasanjo An Extortioner?
Court filing reveals more about Letterman's accused extortioner
Asymmetric Power Boosts Extortion in an Economic Experiment
Adaptive dynamics of extortion and compliance
Defection and extortion as unexpected catalysts of unconditional cooperation in structured populations
Boosting cooperation by involving extortion in spatial prisoner's dilemma games
Competitive Boosterism: How Milwaukee Lost the Braves