Green’s Dictionary of Slang

shit-hot adj.

[shit adv. (1) + SE colloq. hot, attractive, pleasurable]

1. excellent, fashionable.

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

2. first-rate.

[UK]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.
[UK]Barltrop & Wolveridge Muvver Tongue 97: If he is specially sharp for efficiency, he is ‘hot’ or ‘shit hot’.
[UK]T. McClenaghan Submariners I ii: I saw that [film]. It’s shit hot.
[UK]Partridge DSUE (8th edn) 1053/2: since ca. 1918.
[US] 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.
[US]Maledicta IX 161: Canadian troops in WW II introduced shit-hot (now super).
[UK]J.J. Connolly Layer Cake 273: That’s even before they put together a shit-hot murder squad.
[Ire]P. Howard Curious Incident of the Dog in the Nightdress 15: The Berkeley Court is supposed to do a shit-hot buffet breakfast.
[US]Simon & Burns ‘Cradle of Civilization’ Generation Kill ep. 2 [TV script] You did a shit-hot job .