After hard anal sex, having to squeeze the shit juices out of your urethra like when popping a zit so you can take a piss.
I can't take a piss because I have a serious mud wick
A blockage of the male urethra by fecal matter, occurring as a result of violent anal sex without proper preparation. It is removed by grasping the base of the penis and squeezing the blockage out the tip, causing it to resemble the wick of a candle.
"Maybe now she'll figure out why I bought her that enema kit for Valentine's Day", he mused, as he watched his Mudwick curl slowly, lovingly, onto her back.