Green’s Dictionary of Slang

fogus n.

tobacco.

1648		Dekker Canters Dict. in Eng. Villainies (9th edn) n.p.: Fogus, Tobacco or smoak.
1665		Head Eng. Rogue I .
1674		Head Canting Academy (2nd edn) 10: Every one being seated, and store of booz and fogus, (Drink and Tobacco) brought them.
c.1698		B.E. Dict. Canting Crew n.p.: Fogus Tobacco. As Tip me a gage of Fogus, Give me a pipe of Tobacco.
1707		J. Shirley Triumph of Wit.
1719		A. Smith Lives of Most Notorious Highway-men, etc. (1926) 206: Focus, tobacco. Tip me a gage of focus, i.e., give me a pipe of tobacco.
1725		New Canting Dict. [as cit. c.1698].
1737, 1759, 1760, 1776		Bailey Universal Etym. Eng. Dict. [as cit. c.1698].
1741		Canting Academy, or the Pedlar’s-French Dict. 118: Good Tobacco Rum Fogus.
1754		Scoundrel’s Dict. 19: Tobacco – Fogus.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1798		‘St Giles’s Greek’ in Sporting Mag. Dec. XIII 164/1: The cull [...] remained at the bowsing ken, cocking his organ, and tempering his fogus with a few flagges of crank and white-tape.
1809		G. Andrewes Dict. Sl. and Cant.
1811		Lex. Balatronicum.
1821		D. Haggart Autobiog. 28: There was a hole in the roof of my cell through which I handed her plenty of focus, budge, and, in short, part of everything.
1835		Worcester Herald 26 Dec. 4/3: Fogus, tobacco.
1848		Flash Dict. in Sinks of London Laid Open.
1859		Matsell Vocabulum.
1865		Leaves from Diary of Celebrated Burglar 142/1: He was obliged to ‘sling’ for the ‘max’ and ‘fogus’ out of his own ‘kick’.
1870		Hotten Sl. Dict.
1881		Trumble Sl. Dict. (1890).
1895		Crowe Aus. Sl. Dict. 30: Fogus, tobacco.
1906		Minneapolis Jrnl (MN) 24 Jan. 19/3: Give me a line of kill-devil and some fogus.

In phrases

blow a fogus (v.)

(UK Und.) to smoke a pipe.

c.1850

Duncombe New and Improved Flash Dict.