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.
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 28, 2011

A trench that is dug in the center of a defensive perimeter in order to be used as a latrine by soldiers.
by Rakkin' it December 14, 2008

'Trench Wanking' is the activity of masturbating the phallus with gritted teeth whilst crouching and pointing aggressively at the subject of the aforementioned sexual practice.
"Hey Toby, look at that girl, she's pretty hot!" *crouches and begins Trench Wanking*
"Oh yeah, I'd Trench Wank over her. In fact, I will right now" *crouches and begins Trench Wanking*
"Oh yeah, I'd Trench Wank over her. In fact, I will right now" *crouches and begins Trench Wanking*
by John Ever So Rightly August 27, 2012

A deep, vast cavern of seemingly endless proportion of the human rectum. Usually engrossed with fungal crustacean diseases and the lost dreams of small children.
by xboxknowledge June 30, 2011

Ex: Mark: Yo dude how did it go with two guys and one girl last night?Did you get any action?
Luke: Let's just say i am boss at trench wars
Mark: beanz
Luke: Let's just say i am boss at trench wars
Mark: beanz
by mykittenwearsmittens January 12, 2011

by Shini January 29, 2008
