Green’s Dictionary of Slang

1. the mouth.

1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1829		Leicester Jrnl 4 Dec. 4/5: D’ye sose I’ll close up the hatchway of my mouth? If so, may old Davy Jones sink me in his locker.
1889–90		Barrère & Leland Dict. of Sl., Jargon and Cant.

2. the vagina.

1890–1904		Farmer & Henley Sl. and Its Analogues.
1937–84		Partridge DSUE (1984) 535: [...] from ca. 1865.