The feds are federal agents, for example of the American security agency, the FBI, or of the Bureau of Alcohol, Tobacco, and Firearms.
英英詞典釋義
Noun
1. any federal law-enforcement officer
2. the central bank of the United States; incorporates 12 Federal Reserve branch banks and all national banks and state charted commercial banks and some trust companies;
"the Fed seeks to control the United States economy by raising and lowering short-term interest rates and the money supply"