Definitions of bobby:

• noun:   an informal term for a British policeman
• name:  A male given name (very common: 1 in 448 males; popularity rank in the U.S.: #83)
• name:  A female given name (rare: 1 in 12500 females; popularity rank in the U.S.: #1019)
• name:  A surname (rare: 1 in 100000 families; popularity rank in the U.S.: #18799)