Definition: fucksnort (n): The queef-like sound a vagina makes during coitus when air is forced in by a penis or similar object and then expelled around the outside of the penis. This phenomenon is due to the combination of a temporary seal of air around the penis inside the vagina and a rapid increase in air pressure inside the vagina during an inward stroke of vaginal penetration. A fucksnort typically occurs during deep, heavy penetration and can be the source of a good laugh or an awkward moment, depending on the people involved.