a party foul is when you screw up at a party.

note: The band Yellowcard gets its name from party fouling. You get a 'yellowcard' like in soccer if you party foul.
-Spilling a drink on your very expensive Brand new chinese rug.
-Getting too drunk and upchucking on your very expensive brand new Chinese rug.
-Killing the host's dog.
by holly June 27, 2004
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An amazing song by the band Attack Attack!
Have you listened to Party Foul by Attack Attack!? It makes me want to dance.
by Attack Attack Lover January 15, 2009
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Doing something stupid in a big group of people, e.g., a very crowded party, which results in a non-life-threatening but nonetheless unpleasant incident.
The mosh pit at the martini party was a major party foul.
by odysseus_polytropos June 29, 2004
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When multiple people are smoking a hookah, and someone kills the suction from your hose by uncovering their hose. Causes the smoker to have a coughing fit. When a party foul occurs, the foul-ee gets a slap on the hand as a punishment.
I was taking a big hit off the hookah when some idiot committed a party foul and I almost died coughing
by Big Mike November 1, 2004
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Not being cool at a cool party and sending everyone home...
You win beer pong and kiss your partner. Your partner's ex boyfriend, who has no shirt on, flips over the killer beer pong table you spent 3 days on and then drags it outside and throws it off your balcony...party foul...you're welcome Webster!
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When a party-goer smashs the top of the bottle of another party-goer with their own causing the alcohol to foam and overflow. A "Party Fowl" is declared and both parties must chug whatever froths from their bottle.
*"John" sees a "hot", but sober girl, holding a beer. He approachs and hits the top of her beer with his own beer bottle.*
"Party Foul!"
*Both "John" and the "Hot", but sober, girl must now chug any beer which begins to spill*
by Steven July 24, 2004
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