The term "Anctil" refers to when a male ejaculates inside the woman's anus, and then the female fellates him, regardless of whatever fecal matter that may be present on the shaft of the penis. She usually swallows any residual semen. If you can find a girl like this (very common to find in Nashua, New Hampshire), she's a keeper!
There I was in her bed, having anal sex with her when I came and as I pulled out and lay back, she went Anctil on me! I couldn't believe it! I almost proposed marriage to her on the spot!