Green’s Dictionary of Slang

1. a pretty young woman.

1926		Wood & Goddard Dict. Amer. Sl.
1929		(con. 1917–18) C. MacArthur War Bugs 237: Far behind us were [...] field clerks getting stewed in Paris and tipping their hats to hotsy-totsies.
1929		W. Winchell Your Broadway & Mine 16 Mar. [synd. col.] Demaris Dore is better known as ‘Hotsy-Totsy’ [from] her pep, zip and torrid warbling .
1938		Eve. Post (Wellington) 25 Jan. 8/8: Modern Americanisms [...] The names for girls are legion [...] ‘Canary,’ ‘Hairpin,’ ‘Sardine,’ ‘Hotsie-Totsie’ or plain ’darb’.
1949		Monteleone Criminal Sl. (rev. edn) 125: hotsy (n) A young girl. hotsy-totsy (n) A pretty young girl.

2. a magazine devoted to pin-ups.

1929

(con. 1917–18) C. MacArthur War Bugs 62: The Paris editions of the Chicago Tribune and London Daily Mail, together with La Vie Parisienne and other hotsy-totsies.