Green’s Dictionary of Slang

hawbuck n.

a country bumpkin, a lout.

1805		J. Davis Post Captain (1813) 6: The hawbuck has not rolled up a single hammock.
1806		in Spirit of Public Journals IX 312: Damned the hawbuck who quizzed us, and agreed to cross the fields towards Newington .
1827		W. Clarke Every Night Book 75: Rayner, who makes a very passable countryman [...] Meadows for the minor hawbucks.
1832		Egan Bk of Sports 265: The country hawbucks had not the slightest chance [...] to reduce its slipperiness.
1842		T. Hood ‘Tale of a Trumpet’ Poetical Works (1906) 612/2: Happy the hawbuck, Tom or Harry [...] And happy the foot that can give her a kick.
1848		Bell’s Life in Sydney 18 Nov. 1/5: At last came a white-faced hawbuck I saw at the play.
1865		R.S. Surtees Facey Romford’s Hounds 254: He didn’t exactly know whether the noise [...] proceeded from the hounds or from some hawbuck exercising his lungs.
1873		Sl. Dict. 189: Hawbuck a vulgar, ignorant, country fellow but one remove from the clodpole.
1882		G.A. Sala in Living London (1883) May 179: In both plays there is a gang of garrulous, selfish, drunken hawbucks.

In derivatives

hawbuckish (adj.)

second-rate, lumpen.

1824

Annals of Sporting 1 Jan. 53: The battles fought during our last month have been few, and hawbuckish [...] they may afford amusement more form the wallupping each man has given the other, than instruction, as to defending the points termed vital.