look up any word, like cunt:
 
1.
Really shitty.
Fucked up.
Rotten, spoiled.
Not right, psychologically.
Stolen.
Man, that blowjob was foul, she bit my dick!
That motherfucker was one foul biatch.
I'm not buying that shit, it's foul!
by mark August 07, 2003
 
2.
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 06, 2004
 
3.
Impure or not within the confines of acceptable normalcy.
"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 CunningLinguist February 10, 2005
 
4.
Something that is rather unpleasant, dirty, maybe dirty minded, or just plain gross!
Monique is FOUL! She says dirty things and has a dirty mind. She was FERAL (which is even worse), but due to good behavior she is now just FOUL!
by Jinxboi November 21, 2010
 
5.
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
 
6.
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
 
7.
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 18, 2010