The act of settling for the first girl (often grotesque) that speaks to you at a bar, with total disregard for the potential to achieve more attractive suitors. See also Vaginal Complacency
Joe's poon-trenching reached an all time high when he stood patronizing the 240 lb woman in the throwback Bullets jersey not 5 minutes after entering the bar.
to begin fooling around with a female then when the pants come off you unexpectedly find that she has a very shitty ass crack, it doesnt bother the male and he commences to have anal sex
Doyle: "Dude oh my god, the other night I got that girl from the bar back to my apartment and found out she was Brown Trenching."
When you tittyfuck a girl's ass. Your penis will move up and down in between the cheeks without entering the anus. Only usable on a girl with a tight ass.
Trenching: The act of having sex without penetration by simply putting your penis between the woman's legs in her thigh gap and thrusting, or by rubbing the penis between the labia ie. In the trenches.
Dude she was a prude and wouldn't let me bang her, but at least I got of while trenching her.