Green’s Dictionary of Slang

faucet n.

1. (US) a penis.

1759–67		Sterne Tristram Shandy (1949) 338: Are not trouse, and placket-holes, and pump-handles – and spigots and faucets, in danger still, from the same association?
1938		Walter Davis ‘If You Only Understand’ 🎵 Mama, if you know how to handle my faucet, / You can get your pet cream right away.
1981		J. Wambaugh Glitter Dome (1982) 14: Do you know he has a drippy faucet? [...] I happen to know that in Hollywood patrol right now the clap’s as common as a head cold.

2. the vagina.

1798

‘Goody Burton’s Ale’ in Hilaria 79: For till I came across it, / She had never had / A spigot in her faucet.

SE in slang uses

In phrases