anilingus
A form of oral sex between the anus and mouth. Depending upon the context in which it is performed, this sex act can either be used for personal pleasure among consenting parties or as a form of erotic humiliation.
This might lead to scat play as either party might consume of what remains after rimming, especially if one is constipated, has to poop or has an enema applied.
See also
The following tags implicate this tag: rusty_trombone and standing_anilingus (learn more).