This rather graphic phrase literally tells men to go a "skin their penis" but in essence, it is a way of telling someone to shut up by moving on to do something else. This particular phrase is great to use against misogynistic remarks from men, as a man would fear having to perform surgery on his own genitals.
guy: Buy high sell low.
girl: I know how the stock- market works. Why don't you skin your beef jerky? I'm tired of your mansplaining.
When you fail at something in life (eg. failing an exam or not getting a job), go home and spend an hour just standing in the shower, propping yourself up against the wall with your eyes on your feet.
Caleb knew the only thing to do after he didnt get prefect was take a failureshower.