Oh, Fug!

[Neil Ward]

Simon indicated a Scottish meaning of "fug" - being some sort of high-
smelling grass cuttings. 

<snipped fascinating details>

Longman's says: "Fug [informal] - The stuffy atmosphere of a poorly 
ventilated space."

Collins' Concise says: "Fug [Chiefly British] - A hot, stale or 
suffocating atmosphere." 

Roget's Thesaurus lists "fuggy" alongside "stale, airless, musty, 
fusty, frowsty, frowzy...smoky, stuffy, suffocating, foul, noisome, 
noxious, sulphurous, mephitic & miasmic."

I thought I should let you know! ;-)

Neil
FFA