Green’s Dictionary of Slang

1. (US campus) a lit. translation of a classical text, a ‘crib’.

1900		E.H. Babbitt ‘College Words and Phrases’ in DN II:i 22: bicycle, n. A translation used to assist in getting lesson, or in class.
1900		Lincs. Echo 22 Nov. 2/4: In an article on college slang in the United States [...] translations [...] are not only ‘cribs’ but ‘bicycles’, ‘horses,’ ‘trots,’ and ‘ponies’ — in short something that gets you there quickly.

2. (also bike) a prostitute, a promiscuous woman.

1945		Baker Aus. Lang. 123: We have another vocabulary for the harlot and her kind: chromo, bike (a willing girl is sometimes described as an office bike, a town bike, etc.).
1951		D. Stivens Jimmy Brockett (1959) 148: ‘I’m not going to hit him, you little lowheel! I might have known you were the bloody town bike’.
1965		G. Melly Owning Up (1974) 90: A very ugly, but willing woman know to the sergeants as ‘The Widnes Bicycle’.
1965		W. Dick Bunch of Ratbags 198: I was glad I never slept with her that night. I made up my mind then always find out as much as I could about a doll if she was the town bike.
1977		D. Powis Signs of Crime 173: Bicycle See Bike.
1987		Sydney Morn. Herald 15 Oct. 16/1: The pub drinkers are male dinosaurs, the kind who would whistle and jeer at ‘the town bike’, then sneak round to her place later.
1989		J. Morton Lowspeak.
2009		P. Temple Truth 118: Luke was another matter. His mother was a bike called Ellen. Bob Villani bunned her in Darwin.
2012		E. Petulengro Caravans & Wedding Bands 108: Jill [...] was known as the [amusement] park ‘bike’, available to any of the grease-rags, the men who worked the machines.
2018		Times 10 Sept. 🌐 In less tender-minded days she would probably have been known as the office bicycle.
2018		I. Welsh Dead Man’s Trousers [25]: The Exercise Bike (every cunt has pumped it and it doesnae move) approaches me.
2018		C. Hammer Scrublands [ebook] ‘[T]hey sit there and judge me. Like I’m the town bike or something’.
2021		P. Papathanasiou Stoning 34: ‘Good lay, ya mean...’ said a ’fly [...] ‘Town bike,’ muttered another.

3. a bisexual.

1962		F. Norman Guntz 94: If he is normal he is [...] liable to make a lot of noise about it and if he is bicycle: ‘Wheeeeee!!!!’.
1972		B. Rodgers Queens’ Vernacular.
2003		K. Cage Gayle.