log-juice, n. — Green’s Dictionary of Slang

log-juice n.

[the use of SE logwood (used in dyeing and in medicine as astringent) to adulterate port]

a cheap port wine.

1854

‘Cuthbert Bede’ Adventures of Mr Verdant Green (1982) II 152: Mr B. and party are discovered drinking log-juice, and smoking cabbage-leaves.