look up any word, like swoll:
 
1.
As you perform anal sex, air seeps into your counterparts anal cavity and is stored there until finished. After finishing with this endeavor, your counter part stands up and proceeds to fart; air escaping the ass.
I was pounding this girl in the ass from behind, as soon as we were finished I pulled out and heard a few anal echoes.
by Scottisahomie February 11, 2011