thread, v.¹ — Green’s Dictionary of Slang

thread v.¹

[play at thread the needle (see play (at)... v.)]

1. of a man, to have sexual intercourse.

1790		‘Bumper Allnight. Esquire’ Honest Fellow 216: Sentiments [...] The cock that threads his hen, claps his wings, and threads her again.
1958		(con. 1940s) B. Behan Borstal Boy 14: Sheila would be sorry she did not let me thread her.
1966		(con. 1958) R. Farina Been Down So Long (1972) 32: Finished her last spoonful, whoopee. Never thread anyone while they’re eating.

2. (US gay) to have anal intercourse.

1972		B. Rodgers Queens’ Vernacular 89: anal intercourse [...] thread somebody (mid ’60s, fr the penis depicted as a needle).
1989–2003		R.O. Scott Gay Sl. Dict. 🌐 anal intercourse: [...] Syn: thread somebody.