Green’s Dictionary of Slang

nanny-goat sweat n.

(US) rough or inferior liquor.

1941
19501960197019801990
1991
[US]M. Prenner ‘Drunk in Sl.’ in AS XVI:1 Jan. 70/2: liquor [...] nanny-goat sweat.
[US]Cat Howell Book of Naughty Nomenclature 🌐 Booze Nanny-goat sweat.