Green’s Dictionary of Slang

1. (also bore-staff) the penis [SE bore, an auger].

1795		‘Shale’s Rambles’ in A. Carpenter Verse in Eng. in 18C Ireland (1998) 504: My bore-staff’s long, both stiff and strong, my shuttle still in order.
1838		‘A Stiff Upright Parody’ Rambler’s Flash Songster 11: Rory O’More Had A Hell Of A Bore.

2. the vagina [SE bore, a hole, a chink, crevice, or cranny].

1842		‘Miss Bounce Of Cock-Lane’ Nobby Songster 34: She sent him notes full a score, Sir, / Requesting that he’d come once more Sir, / But this he declined, for to his mind, / He never had met such a bore Sir.
1890–1904		Farmer & Henley Sl. and Its Analogues.
1896		Farmer Vocabula Amatoria (1966) 52: Calibre, m. The female pudendum; ‘the bore’.
1941		in G. Legman Limerick (1953) 213: There was a young lady named Moore / Who, while not quite precisely a whore, / Couldn’t pass up a chance / To take down her pants, / And compare some man’s stroke with her bore.

3. (UK gang) a rebored, usuable firearm.

2018-20

T. Thorne (ed.) ‘Drill Slang Glossary’ at Forensic Linguistic Databank 🌐 Bore – a rebored, reactivated firearm.