Green’s Dictionary of Slang

1. excellent, fashionable.

1999		K. Sampson Powder 17: Nineteen years old and shit hot with the world at his feet.
2000		P. Howard Miseducation of Ross O’Carroll-Kelly (2004) 10: But to be honest with you, roysh, I wasn’t always shit-hot.
2001		OnLine Dict. of Playground Sl. 🌐 shit-hot n. excellent. very good.

2. first-rate.

1965		L. Dunne Goodbye to The Hill (1966) 121: So I was a louse and a sort of shit-hot smart alec who knew it all.
1980		Barltrop & Wolveridge Muvver Tongue 97: If he is specially sharp for efficiency, he is ‘hot’ or ‘shit hot’.
1980		T. McClenaghan Submariners I ii: I saw that [film]. It’s shit hot.
1984		Partridge DSUE (8th edn) 1053/2: since ca. 1918.
a.1986		in E. Cray Erotic Muse (1992) 48: O, my bird got all shot up, and I’ll probably cry a lot, / But I still think that it’s shit-hot, so fuck ’em all.
1986–7		Maledicta IX 161: Canadian troops in WW II introduced shit-hot (now super).
2000		J.J. Connolly Layer Cake 273: That’s even before they put together a shit-hot murder squad.
2005		P. Howard Curious Incident of the Dog in the Nightdress 15: The Berkeley Court is supposed to do a shit-hot buffet breakfast.
2008		Simon & Burns ‘Cradle of Civilization’ Generation Kill ep. 2 [TV script] You did a shit-hot job .
2018		G. Gilmore Base Nature [ebook] ‘You think you’re shit-hot just because you made a lot of money’.