Green’s Dictionary of Slang

1. the vagina.

1798		‘The Blue Vein’ in Hilaria 61: For the squire and curate, when heated with ale, / Doll Dairy had milk’d in her amorous pail.
1836		‘Jack’s Jobs’ in New Cockalorum Songster in Spedding & Watt (eds) Bawdy Songbooks (2011) II 20: First with Kate the housemaid / Jack thought he couldn’t fail, / Altho’ the girl was much afraid, / He caught hold of her pail.

2. (US black) the stomach.

1944

‘Jiver’s Bible’ in D. Burley Orig. Hbk of Harlem Jive.

3. (US) a car.

1944

D. Runyon Runyon à la Carte 129: Homer runs his old pail as close as possible to the side of the building where the other cars are parked.