Green’s Dictionary of Slang

completely, utterly.

1843		T. Haliburton Sam Slick in England II 145: I’d make them Irish members dance like ravin’ distractin’ bed bugs.
1871		C.G. Leland ‘Breitmann at a Picnic’ in Hans Breitmann in Europe 283: De Dootch got ravin droonk ash sin, / Dey smash de windows out und in.
1898		J. Fox Jr ‘Courtin’ on Cutshin’ in Hell Fer Sartain and Other Stories n.p.: He tol’ Polly Ann that Jeb was ravin’ crazy ’bout her.
1927		H.C. Witwer Classics in Sl. 45: The fans went ravin’ crazy.
1940		E. O’Neill Iceman Cometh Act III: You’re raving drunk, Hugo. I’ve never seen you so paralysed.
1956		‘Raymond Thorp’ Viper 97: I got raving high.
1962		H.S. Thompson letter 10 May in Proud Highway (1997) 336: I got raving drunk with the Dutchman.