The farting sound made while fucking someone either in the vagina or ass.
As the penis plunges in and out of the vagina or anus, a farting noise is made sounding similar to one that comes from the anus when flatulence occurs.
John: "Damn, me and Jessie were going hard at it all night!"
Dave: "Wow! Really?"
John: "Yup, so hard that I even heard a fuck fart!"
when a girl or a guy gets fucked hard in the ass and has copious amounts of cum sprayed in the ass. Then after they fart and massive amounts of cum and shit balls splatters out of the asshole
i had the biggest ass fuck fart this morning form gettting fucked in the ass last night