The act of participating in anal sex with a willing partner, cumming in their ass, and then proceeding to employ a butt plug to “cork” the seminal fluid in their anal cavity to age and mature.
After a number of days, this will ferment into a unique beverage suitable for consumption via fletching.
“Right then mate— last night I went Wetherspoons down the kings road… orange haired geeza’ asked me for a Durham Corking— so I came in his arse and plugged ‘im up. Absolutely impeccable. Better than that piss Carling that’s for true.”