Vagina. Usually of a slut.

Used most commonly with "laying pipe."
Dude I laid some pipe in that bitch's cock trench last night. It was nasty.
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Very similar to trench foot caught by soldiers during world war I, trench cock is obtained after a long night of rough fucking in which both parties fall asleep while the male's one eyed battering ram remains inside the female's pork wallet. The excessive amount of moisture exposed to penis causes it to saturate and smolder causing the infamous trench cock. Extreme cases have resulted in the male genitalia sloughing (falling) off.
Friend #1: Hey bud how did last night go with that slut you scooped up from the titty club?
Friend #2: Aw man it was going great, I was really pounding that shit when we both passed out.
Friend #1: What is the big deal about that?
Friend #2: Well I fell asleep with my cock still inside her.
Friend #1: And?
Friend #2: Well I am worried I may have gotten trench cock and now my junk might fall off.
by deezlet August 18, 2009
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When you masterbate into your roommates sock knowing he has trench foot.
"I just came in your sock and now I have trench cock"
by Brain Decay June 25, 2016
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The long term effects of sitting in a hot office when your testicles and knob stick to your inner thigh.
"It's so hot in here"

"Yes, I've had trench cock for days"
by Pacific22 July 17, 2017
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In the event of sexual encounter lasting longer than three hours, the penis begins to turn black and blue, and can even fall off.
"Hey I heard Ethan got trench cock last night."

"Yeah but he totally left her gobsmacked."
by William Bleauxerbackoüt April 28, 2019
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A penis that is long enough for the whitish big pussies.
That chick's p**** was so big I had to pull out my trench cock to hit the bottom.
by mikecgm33 October 14, 2017
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