1See also:fed upFed is the past tense and past participle of feed .
2N-COUNT [usually plural](美国安全局、联邦调查局、酒精、烟草与枪支管理局等)联邦机构工作人员 The feds are federal agents, for example of the American security agency, the FBI, or of the Bureau of Alcohol, Tobacco, and Firearms. (美国安全局、联邦调查局、酒精、烟草与枪支管理局等)联邦机构工作人员 [US, informal]