To be deceitful intentionally knowing your actions will most likely cause negative reactions yet the "foul" selfish person does the deed regardless of anyone else's feelings.
"Man I know Turkeys and Chickens stink, but that fowl farm is fucking foul."
"Dude, you hit a baseball like you smell, and that would be foul"
By Andeee
Foul
The filthiest of the filthy. Foul refers to the smell of a filthy bitch / slut / skank-ass slut / or filth-a-ka-bob. This is the nastiest of the nasty of reeks.
Foul: a foul horse is a kind if fruit which can't be seen in moonlight. It uses gasoline and is rather dangerous. Trees are green anyway and the bike is at home.