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1.
ladys genitalia with an unpleasant odour
bet she's got a stinktrench!
by Simon Attfield February 08, 2004
 
2.
A smelly vagina, often projecting the aroma of stale crab paste or the contents of a fly ridden dustbin. A term coined in the 19th century but exemplified by pineapple headed chavs who appear on the Jeremy Kyle show.
Marcus: Where's Shaz tonight?

Gareth: Standing on her head in the shower I hope. I ain't going down on that tart till she's toned down the stink trench.
by Penny Smith April 09, 2011