资料来源 : pyDict

警察

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Bobby \Bob"by\, n.
   A nickname for a policeman; -- from Sir Robert Peel, who
   remodeled the police force. See Peeler. [Slang, Eng.]
   --Dickens.

资料来源 : WordNet®

bobby
     n : an informal term for a British policeman