Foulest meaning : Covered with, or containing unclean matter; dirty. (of words or a way of speaking) obscene, vulgar or abusive. Detestable, unpleasant, loathsome. Disgusting, repulsive; causing disgust. Ugly; homely; poor. (of the weather) Unpleasant, stormy or rainy. Dishonest or not conforming to the established rules and customs of a game, conflict, test, etc. Entangled and therefore restricting free movement, not clear. Outside of the base lines; in foul territory.