Green’s Dictionary of Slang

(US) satisfactory, fine; also as adv.

1859		Calif. Police Gazette 17 Apr. 1/5: If we had done it then, we would have been all ‘hunk’.
1867		Eve. Teleg. (Phila., PA) 21 Sept. 6/2: Dorey, you’re all hunk, you are.
1873		Forest Republican (PA) 17 Dec. 1/6: Let her slide, P.M., she’s all hunk.
1882		County Paper (Oregon, MO) 10 Mar. 8/4: The chair explained that ‘ll Hunk’ was the Latin for all right.
1891		W. De Vere ‘Roger’ Tramp Poems 17: We’d [...] closed up the shanty all hunk.
1903		S.F. Call 13 Sept. 2/3: Notify father all hunk. Keep it dark from others.
1910		N.Y. Tribune 11 Sept. 7/2: Half full she is — all hunk. Now for the lamps.
1921		Columbian Eve. News (MO) 12 Nov. This here mud cleat - business is all the hunk: .
1942		Berrey & Van den Bark Amer. Thes. Sl. §279.6: satisfactory, all a-hunky, hunk.