thumpkeg
When you lay a woman upside down between two objects to hold her up by her legs and pound her from above using all your weight to push yourself inside
Woman: wanna try a new sex move?.
Him: You want me to make you into a thumpkeg?.
Woman: what's that?.
Him: Let me show you.
Him: You want me to make you into a thumpkeg?.
Woman: what's that?.
Him: Let me show you.