A girl so skinny that when fucking her from behind it's easier to grab her by the waist with onehand and finish yourself off by using her as a wanking mitt.
When one wank just isn't enough. To be considered a binge wanker one must bash the bishop multiple times in a short space of time. A true binge wankathon would last through the night until sunrise, not many have enough juice in the tank for this one.
Gary "Have you seen the state of Goffy today?"
Andy "Yeah he must have been binge wanking all night"
Gary "The fucking binge wanking mong"
'TrenchWanking' 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*