Green’s Dictionary of Slang

noisy, boisterous, rip-roaring, thus v. rootin’ (and) tootin’, acting vigorously, boisterously.

1875		Nodal & Milner Gloss. Lancs. Dial. 228: He’s a rootin’ tootin’ sort of a chap.
1896		F.P. Dunne in Schaaf Mr Dooley’s Chicago (1977) 122: Th’ prosperity iv th’ gr-reat an’ imperyal an’ rootytoot City iv Chicago.
1926		D. Branch Cowboy and His Interpreters 222: Rootin’ Tootin’, look w’at this yere old locoed Santa Claus brung us.
1934		E. Cunningham Triggernometry (1957) 86: In 1880 Tombstone was at the height of her boom. She was a rooting-tooting all-night town.
1949		(con. 1943–5) A. Murphy To Hell and Back (1950) 103: The roughest, toughest, rootin’, tootin’ division in the ETO.
1951		C. Stoker Thicker ’n Thieves 78: Brenda [...] was rootin’, tootin’ and gatherin’ in the ‘scratch’ (or money), at the apex of her career as Boss Madame of a regiment of Hollywood prostitutes when she was really steaming and rolling.
1955		in Randolph & Legman Ozark Folksongs and Folklore (1992) II 676: The rooting-tooting spider / Went up the water-spout.
1963		G. Lambert Inside Daisy Clover (1966) 156: I sold tickets at a museum which showed what a beer saloon was like in the old rootin-tootin days.
1972		D. Dalby ‘African element in American English’ in Kochman Rappin’ and Stylin’ Out 186: rootin-tootin, ‘noisy, boisterous’.
1980		Maledicta IV:2 (Winter) 237: The frontier braggart’s rootin’-tootin’, high-falutin’ ‘half-horse, half-alligator’ ringtailed rhetoric is in decline.
1992		D. Burke Street Talk 2 207: He is the meanest rootin’ tootin’ (highfalutin) cowboy in the West!
2000		Sun. Times Culture 6 Feb. 7: You’re the fastest-shooting, most rootin’-tootin’ cowboy in the west.
2005		Mad mag. Apr. 50: I will personally hang any c%@* s%*%#r who says [...] rootin’-tootin’.