Green’s Dictionary of Slang

1. trotting races [trots n. (4)].

1966		J. Holledge Great Aus. Gamble 119: Then ‘the trots’ were aptly described by the cognoscenti as ‘the red hots’.
1967		‘Whisper All Aussie Dict.’ in Kings Cross Whisper (Sydney) xxxix 4/4: red hots: Trots.
1996		J. Byrell Lairs, Urgers & Coat-Tuggers 212: The previous night he’d not only dropped a motza at the trots but also [...] tied one on with the little gang of compadres he’d fallen in with out at the Harold Park ‘red hots’.
2013		T. Peacock More You Bet 15: ‘The trots’ (or ‘the red hots’ as they are aptly referred to in rhyming slang).
2021		Betoota-isms 2350: ‘My mechanic has a contact down at Menangle [i.e. a major trotting track], every service he slips me a free tip for the Red Hots’.

2. dysentery [trots n. (1)].

1999		G. Seal Lingo 91: The red hots means [...] the trots, as in dysentery.
2002		Pete’s Aussie Sl. Home Page 🌐 red hots: the trots, dysentery.