Green’s Dictionary of Slang

(US) nothing.

1969		H. Searls Hero Ship 19: ‘The USS Shinola . . .’ The nickname had already reached the chief’s mess.
1986		S. King It (1987) 24: ‘Oh shit and Shinola!’ he yelled, dismayed.
1987		‘Joe Bob Briggs’ Joe Bob Goes to the Drive-In 73: It don’t matter much when we’re talking weasel, because they don’t see shinola.
1989		(con. 1969) W.E. Merritt Where the Rivers Ran Backward 270: Walter Cronkite didn’t know a moon shot from Shinola, so CBS hired Arthur C. Clarke.