From Christopher Moore's hilarious novel "Fluke".

Used when bad shit happens.

The opposite of bee's knees
I spent the night in jail because of a so called "friend"; that is some heinous fuckery most foul.
by Ender December 4, 2004
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Having sex with livestock during a barn dance or similar country gathering or celebration. Typically done under the influence of alcohol and/or drugs. The act must be witnessed by fellow party goers, who may cheer on the offender due to also being under the influence.
Gerald: Hey, Bill, where did Mitch go during last night's barndance?
Bill: Oh he done got shitfaced on moonshine and commited a West Virginian Party Foul
Gerald: A wha?
Bill: Dumbass fucked a sheep in front of everyone, and the damndest thing about it, the sheep had panties on.
Gerald: Sumbitch fucked my Gloria!?
by wisemanoncesaid August 8, 2018
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A sports fan who only supports his team when they struggle. They routinely root for the under dog.

It can also be applied to fans of other things, in particualar indie music. When a band makes it big, their foul weather fans will write them off as "sellouts."

Opposite of fair-weather fan, one who only supports a sports team when they do well.
Bob only liked the Giants until they won 88 games in 2009. Now that they won the 2010 World Series, he won't go to games any more. What a foul weather fan.

Jay only liked Indie Snob Band #675 until they made it big with their hit "Two Chords" which succeeded to to the lack of Dave Navarro and his 2 chords of bland on the airwaves.
by Downvoting Victim May 19, 2011
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When you offer to get someone a pastry from a bakery and you bring back a bran muffin.
She offered to get me a pastry and brought back a bran muffin - such a bakery foul.
by Nduck May 9, 2021
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When you offer to get someone a pastry from a bakery and you bring back a bran muffin.
She offered to get me a pastry and brought back a bran muffin — such a bakery foul.
by Nduck May 9, 2021
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