Green’s Dictionary of Slang

1. stomach-ache.

1859, 1860		Hotten Dict. of Modern Sl. etc.
1873		Sl. Dict.
1890–1904		Farmer & Henley Sl. and Its Analogues.

2. a state of depression.

1859, 1860, 1873, 1890–1904		[as sense 1].
1935		Dundee Courier 6 Apr. 6/3: Those fits of depression we call the ‘blues’ nowadays, they called wiffle-woffles.