Definition of "stingo"

Shall I set a cup of old stingo at your elbow?

1715, Joseph Addison, The Drummer, or The Haunted House

The elevated cavaliers sent […] for two tubs of merry stingo.

1822, [Walter Scott], Peveril of the Peak. […], volume (please specify |volume=I to IV), Edinburgh: […] Archibald Constable and Co.; London: Hurst, Robinson, and Co.

For my outside I never need fear me / While warm with real stingo within.

c. 1824, John Clare, The Toper's Rant