Definition of "bobby"

If I am wrong, and if Lessingham’s wrong, how do you explain his extraordinary insistence on taking it inside the cab with him, which the bobby describes?

1897, Richard Marsh, The Beetle

Bro I’m booky, I’ll take your food if my belly starts rumblinThey rap about bootings, they ain’t blammed nobodyHold that properly when I bang that dottyI put sniff in a rex, and I slang that bobby

2017, “Next Up?”, Digga D (lyrics), performed by 1011 (Digga D x Sav'O x T.Y)

The already low proportion of Friesian and Hereford Friesian cross calves sold as bobbies declined to almost insignificant proportions and there was a very steep drop in the proportion of bobby calves in the other breeds

1970, Great Britain. Milk Marketing Board. Breeding and Production Organization, Report of the Breeding and Production Organization

The following is the Victorian code of practice as it refers to the welfare of bobby calves.

2002, John Moran, Calf Rearing: A Practical Guide, page 44

All bobby calves must be fed as close as possible to, and at least within 6 hours of, the time of transportation.

2004, Primary Industries Standing Committee, Cattle, page 21

My kids like bobby bananas, but they're in plastic.

2017 June 14, Sarah Catherall, “I tried to live plastic free for a week and it's impossible”, in The Press