a person whose job is to take care of wild animals and birds that are kept on private land in order to be hunted （私有猎场的）猎物看守人
Idioms
poacher turned gamekeeper
- (especially British English)
a person who has changed from one situation or attitude to the opposite one, especially somebody who used to oppose people in authority but is now in a position of authority 经过角色转换的人；当年造反今天掌权的人