Green’s Dictionary of Slang

a large vagina; thus bushel-cunted adj.

1674		Rochester ‘Timon’ in Works (1999) 260: Each man had as much room as Porter, Blunt, / Or Harris had in Cullen’s Bushell Cunt.
1748		Spy on Mother Midnight I 25: I am afraid, you meafure other People's Corn by your own Bushel, which, you know, may not be fair; for, if your Vessel be staved; or there is a Hole in the Bottom, there is no Wonder if you think my Staff too short.
1896		Farmer Vocabula Amatoria (1966) 75: Connasse, m. 1. The female pudendum; specifically of an old woman; ‘a bushel-cunt’.
1980		Maledicta IV:2 (Winter) 184: The depucellated virgin […] becomes worthy of the denominations cow-cunted, bushel-cunted, sluice-cunted, double-cunted.