Green’s Dictionary of Slang

1. the anus.

1790

Banquet of Wit 14: Let them all be turned bung up [...] I’ll take care to leave scarce a crevice open.

2. the vagina.

1836		‘Come, Sleep With Me’ in Frisky Vocalist 31: Come, with my little crevice play.
1837		‘The Flea Shooter’ in Ri-tum Ti-tum Songster 28: A flea has just crept up my crevice so fair.
1890–1904		Farmer & Henley Sl. and Its Analogues.
1893		‘Bob Sterling’ Town-Bull 18: Two better oiled crevices coould not be found.
1902		D. St John Memoirs of Madge Buford 13: Feeling the soft crevice [...] pressing my finger betwen my cunt’s hot lips.
1980		Maledicta IV:2 (Winter) 182: The simplest words in common use for this ‘nasty thing’ [...] are those accepting the female sexual apparatus as a simple receptacle. These include [...] cranny, crack, crevice.