foulest
adjective
Definitions
Covered with, or containing unclean matter; dirty.
Example: A ship's bottom is foul when overgrown with barnacles
(of words or a way of speaking) obscene, vulgar or abusive.
Example: His foul language causes many people to believe he is uneducated.
Detestable, unpleasant, loathsome.
Example: He has a foul set of friends.
Disgusting, repulsive; causing disgust.
Example: There was a foul smell coming from the toilet.