SE in slang uses
[1940s+] (US black) a liquor store.
[1930s] an erotic picture postcard.
[1960s+] sexual intercourse in the face-to-face ‘missionary position’.
[20C+] (Irish) unpopular fatty bacon, imported from the US.
[1990s+] group sex between one woman and two men; the woman simultaneously fellates one man while being taken from the rear by the other.
[1910s–30s] Park Lane Hotel, London.