Green’s Dictionary of Slang

1. (UK Und.) to leave or enter a house from the back way.

1889–90		Barrère & Leland Dict. of Sl., Jargon and Cant.
1890–1904		Farmer & Henley Sl. and Its Analogues.

2. to have homosexual or heterosexual anal intercourse.

1890–1904		Farmer & Henley Sl. and Its Analogues.
1927		‘J.M. Hall’ Anecdota Americana I 42: Three nude men were practising a sphinctrian posture, that is to say, in vulgar language, back-scuttling each other. [Ibid.] 156: There was nothing she hadn’t done for him [...] She had stopped at no licentiousness. He had screwed her and back-scuttled her.
1930		(con. 1918) J. Hanley German Prisoner 33: ‘I’d like to backscuttle the bugger.’ ‘Go ahead,’ shouted O’Garra.
1939		H. Miller Tropic of Capricorn (1964) 194: Finally I decided to make an end of it by turning her over and back-scuttling her.
1966		Trimble 5000 Adult Sex Words and Phrases.
1972		B. Rodgers Queens’ Vernacular.
1996		H. Roth From Bondage 256: He could – in imagination – ask Larry the filthiest questions: Hey, Larry, did you ever try back-scuttling Edith? I have to back-scuttle my kid cousin Stella most of the time.

3. to have heterosexual intercourse in the rear-entry position.

1909		Farmer & Henley Sl. and Its Analogues (rev. edn).
1971		R.D. Pharr S.R.O. (1998) 274: ‘Them square cats like them fat-assed bitches. They likes to back scuttle ’em’.