When you are having anal sex with a girl and you pull out and put it into her vagina.
Friend #1: I was have amazing anal sex with that filthy little filly Stacy and I pulled it out and put it deep in her bum, straight mud-flappin' bro.
Friend #2: Amazing, pure class.
Bosoms, breast, boobs so nice they make the boys bow down.
Cindy has those bowsoms, so nice they make you bowdown.
When you pull out of a girls vagina and stick it in her bum.
I gave Jenny a filthy mudflap the other night, it was amazing.