Green’s Dictionary of Slang

shitkicking adj.

[shitkicker n. (3)]

(US) rough, crude, rural (cite 1996 seems to take word literally).

[US]E. Shrake Strange Peaches 4: I starred as a genuine, authentic, pistol-shooting, shit-kicking cowboy.
[US]S. King It (1987) 358: Richie spotted Henry Bowers and his shitkicking friends.
[US]Randolph & Legman Ozark Folksongs and Folklore I 431: Randolph’s later style-pace-and-spirit markings as to the singers’ method of singing, give this one as ‘Shit-kicking style’.
[UK]Guardian 14 Sept. 193/1: ‘Casino’ also included [...] Joe pesci creaming, ‘You shit-kicking, stinky, horse-manure smelling, mother f***er, you’.
[US]C. Cook Robbers (2001) 231: Them’s my workboots, the man said [...] They my shitkicking boots.
[UK]Observer 24 Aug. 93/4: Even to those groups [...] who have tapped into its tumble-down, shit-kicking chic.
[US]Philadelphia Inquirer (PA) 14 July ZZ/8: Doc Marten’s, the world’s premier shit-kicking boots.

In compounds

shitkicking music (n.)

(orig. US) music that makes the hearer want to get up and dance, shout, sing, generally have a good, boisterous time; thus also shitkicking records.

[US](con. early 1950s) J. Peacock Valhalla 57: They got a lot of shitkickin’ records there. [Ibid.] 121: You like shitkicking music, ne?
[US]Indiana Gaz. (PA) 27 May 13/4: [T]hey’re ‘shit-kicking music’ at its best!
‘Digestive’ eye 2 Oct. 🌐 Mr. Bastard promises ‘serious shit-kicking music,’ including an ultra-rare appearance by his old compatriots King Kurt.
Pensacola News Jrnl (FL) 9 Nov. 130/1: [H]igh-energy shit-kicking music.
[US]C. Stella Rough Riders 83: You always got that shit kicking music on [...] of course you didn’t see me.