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.
Shut your legs, you're making this room smell foul you slut!
by Jake July 6, 2004
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Nasty, disgusting, something so raunchy that there is no other word to describe it.
A 300lb woman in spandex is FOUL.

A New Orleans Facial is FOUL.

Tobacco chew stuck to the wall is FOUL.

Fecal matter in the house is FOUL.
by MrsMickles January 19, 2010
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Foul is a adjective for those of a high caliber vocabulary, it is used to describe almost anything; it can be used positively or negatively, however best used when something is SUPER FUCKING FOUL.
Dude, that doobie was seriously the foulest ever, I sat there for hours staring into a foul abyss, it was dank af fam.
by Dirty Sarah January 8, 2017
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An interjection used when one disapproves of something, similar to "fail".
A kid is playing soccer, and is about to score a goal. At the last second, he trips and does a faceplant in the mud.

Random person on the sidelines: Foul!
by musickeepsmyheartabeating June 18, 2010
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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.
caution!!! a foul horse is free!!!
by DonPr June 25, 2010
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Adjective

Something that is just incredible, basically to good to be true, amazing, on. So good it's foul.
That was such a funny and foul kid.
That is a foul jacket, love it.
You're foul, the foulest person I've ever met, marry me!
by Cultured,whatofit September 10, 2010
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'Foul' can also be used as a positive adjective.
e.g.'Those trainers are totally foul, dude', meaning 'Those trainers are really rather cool'.
by Dave Davidson December 26, 2003
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