Green’s Dictionary of Slang

fogo n.

[? SE fog + hogo, f. Fr. haut gout, high taste, i.e. a high or putrescent flavour, an offensive taste or smell, or foh!, an excl. of disgust]

1. tobacco.

‘Pot-Companions’ in N. Thompson Choice Collection of 120 Loyal Songs 258: Then bring in a Paper / of excellent Fogoe, / That we may perfume / the whole house with the [? hogo].

2. a stench, esp. of breaking wind.

[UK]]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 82: Fog — smoke; Fogo, the same, but with a stench.
[UK] ‘A Blow-Out Among The Blowen’ in Secret Songster 17: The nasty old whore / Squatted down on her a--- and s--t bang on the floor [...] Oh, then sich a fogo vos in every part, / The cock loft smelt vorser than any night cart.
[US]T. Haliburton Sam Slick in England II 270: Phew! let me light a cigar to get rid of the fogo of it.
[UK]Duncombe New and Improved Flash Dict.
[UK]Hotten Sl. Dict.

In derivatives

In exclamations

fogo to the fake!

among con-men, a cry that indicates they have been found out.

[UK]Kendal Mercury 14 Feb. 3/3: Every ‘Sam tumbles to the dodge’ [...] and the best plan for the mud-lark is to cry ‘fogo to the fake! (terms of contempt).