During penetration, cheese churning is the act of physically rotating your penis inside of your partner 360 degrees, usually involving the whole body rotating along with it. After ejaculation, the churned semen resembles that of butter or cheese, not to be mistaken for dick cheese.
A woman or man will drink gallons of milk or take laxative and lay with with their legs in the air asshole gaped while the man takes his penis and stirs the shit around with it
While doing a girl in the ass without the benefit of an enema, you discover she has recently eaten some nuts which are now harshly scraping your dick raw as you fuck.
I was totally rushed so I slammed right into her ass... then I realized I was churning chunky peanut butter. That shit was painful but I just couldn't stop, dude!