1. Pet form of Bob, familiar perversion of Robert.
2. [Hence probably in allusion to the name of Mr. (afterwards Sir) Robert Peel, who was Home Secretary when the new Metropolitan Police Act was passed in 1828.] A slang nickname for a policeman. See also PEELER.
1851. Mayhew, Lond. Labour, I. 16/1 (Hoppe). He could muzzle half a dozen bobbies before breakfast.
1877. Besant & Rice, Son of Vulc., II. xxiii. 367. [He] might have been killed only that the bobbies interfered.
1884. L. J. Jennings, in Croker Papers, II. xiv. 17. Frequently when the constables made their appearance they were hooted and insulted, mobs following them crying out crusher, raw lobster, Bobbies, and Peelers.