Green’s Dictionary of Slang

1. a euph. for any obscenity; thus also so-and-soing adv.

[1723		C. Walker Authentick Memoirs of Sally Salisbury 49: Exposing her well-shap’d Leg &c. to his View, she ty’d her Garter; when perceiving some uncommon Heavings and Agitations in the Wonder-struck Fellow, she said to him, D--n you for a Rascal! Is it so and so with you? If it be, take that, and go to a Whore; and at the same time gave him a Crown].
1929		(con. 1917–18) C. MacArthur War Bugs 223: He regretted that he had no bullets to spare on so-and-so so-and-sos.
1929		E. Wallace Kennedy the Con Man iv. in Red Aces 173: ‘That’s what we pay rates and taxes for, and no so-and-so policemen in sight!’ He did not say ‘so-and-so’, but Mr. Reeder thought his profanity was excusable .
1939		P. Cheyney Don’t Get Me Wrong (1956) 54: Pedro then says oh yeah an’ that she is a so-an’-so liar.
1942		S. Philips Big Spring 1: ‘What kind of so-and-so place is this,’ he griped.
1950		C. Harris Three-Ha’Pence to the Angel 43: When mother comes after ’im, ’e says ’e’ll drop the pair of ’em, mum and ’er so-and-so sister, among the works if ’e ’as any more of ’em.
1968		J. O’Grady Gone Troppo (1969) 130: ‘Strike me x-y-z bloody roan an’ so-and-so purple,’ he roared.
1970		C. Brown Down All the Days 47: I won’t sit and hear Jem Larkin insulted in me own house by a so-and-so woman that knows nothing about anything but bloody babies!
1992		R.C. Cruz Straight Outta Compton 64: He wasn’t about to take any gump from a so-and-so self-proclaimed homicide officer who had done the nasty with a white girl.
1993		(con. 1918) P. Barker Eye in the Door 93: This war’s the Trojan horse, only they’re all too so-and-soing daft to see it.

2. in a given manner.

1912		Ade Knocking the Neighbors 10: They ordered up Cape Cods, Pommes Let-it-go-at-that, Sweetbreads So-and-so.
1925		D. Hammett ‘Corkscrew’ Story Omnibus (1966) 221: She began to shoot questions at me: Was this still so-and-so? Was that still thus?
1929		(con. c.1913) J.B. Booth London Town 91: The cuffs exactly so-and-so.