Green’s Dictionary of Slang

(US) extremely cold.

1955		B. Schulberg On the Waterfront (1964) 138: It was winter time an’ the water was colder than a nun’s — well, I mean it was ice water.
1972		D. Jenkins Semi-Tough 72: It can also get colder than a nun’s ass.
1997		(con. 1970s) G. Pelecanos King Suckerman (1998) 39: It was colder than a nun’s snatch in there.

(US) lit. or fig., very cold.

1953		L. Uris Battle Cry (1964) 68: Colder than a welldigger’s butt out here.
1977		A. Brooke Last Toke 219: Richie shivered, pulled his collar tight at his throat. ‘Colder ’n a well-digger’s ass!’.
1986		R.G. Barrett Godson 9: ‘It’s colder than a well-digger’s arse’.
2012		M. McBride Frank Sinatra in a Blender [ebook] It was colder than a well digger’s ass in January.
2013		T. Robinson Hard Bounce [ebook] All business and colder than a welldigger’s arse.

(US black) of weather, very cold.

1971

R.D. Pharr S.R.O. (1998) 354: ‘It’s colder than a whore’s pussy out there this morning’.

1. of weather, very cold.

1955		(con. 1939–45) J. Klaas Maybe I’m Dead 95: It’s – that wind. It’s colder than a witch’s tit.
1970		D. Ponicsan Last Detail 41: It’s colder than a witch’s tit out.
1974		V.E. Smith Jones Men 163: It’s colder’n a witch’s titty in a hailstorm.
1981		H. Gould Fort Apache, The Bronx 160: It was colder than a witch’s tit. The wind stabbed through his coat.
2006		C. Hiaasen Nature Girl 201: That goddam river is colder than a witch’s titty.
2019		C.D. Rosales Word Is Bone [ebook] ‘She looks colder than a witch’s tit’.

2. of emotions, very unfriendly.

1984

Partridge DSUE (8th edn) 238/2: later C.20.

3. sexually frigid.

1966

T. Keyes All Night Stand 27: It’s all lies, they are all colder than witches’ tits.

see cold as Kelsey’s nuts under Kelsey’s nuts n.