Green’s Dictionary of Slang

1. a woman [? = sweetheart].

1862		Worcs. Chron. 12 Nov. 4/1: If you like [...] I will send a few thickuns to bring you and your tamtart [sic] up to Start.
1882		Sydney Sl. Dict. 8: Tom-tart, Sydney, phrase for a girl or sweetheart.
1890		Dead Bird (Sydney) 13 Sept. 2/1: She was a wopping big tom tart with a complexion like a secretary of a Labor Society.
1906		Sun. Times (Perth) 9 Sept. 4/8: When the tom-tarts peroxided, / Ring the rhino in the tills.
1913		Truth (Sydney) 23 Mar. 11/6: Each unfortunate tom tart / Were beloving of a black ’un, / Lord! ’twould break a castiron heart!
1941		Baker Popular Dict. Aus. Sl.
1955		N. Pulliam I Travelled a Lonely Land (1957) 240/2: tom-tart – sweetheart.

2. (US) a breaking of wind [= fart n. (1)].

1944		Maurer & Baker ‘“Aus.” Rhyming Argot’ in AS XIX:3.
1960		J. Franklyn Dict. of Rhy. Sl.

3. see tom-tart under tom n.¹²