The hench (UK slang for big and bulky/muscular) combined with "hench stench" so as to describe a bad smell - chiefly from a bodily source but can relate to environmental smells
Used as an anthropomorphism of a particulary smelly fart.
Piers: What was that sound?
Wally: Errrr..
*2 seconds passes*
Piers: Mate, that was a HENCH STENCH!
Piers: What was that sound?
Wally: Errrr..
*2 seconds passes*
Piers: Mate, that was a HENCH STENCH!
by Guffmeister November 28, 2011