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9.
When something stupid, embarrassing, or simply unacceptable is done at a party. Examples of this include spilling beer, breaking a lamp, throwing up, getting so drunk that you scoot on the floor in just your boxers, choking on a shot, ect.
Hey, can Alex come on Friday?
Naw man, he'll probably party foul again.
by Steven Waterdog the Third March 22, 2010
 
1.
Something that goes wrong at a party.

Often when someone spills or breaks or drops something at a party (often resulting in a mess or general spectacle), or when someone does something embarassing or dumb.

Usually accompanied by someone actually yelling, "Party Foul!" while everyone else laughs because they're drunk.
** Jake drops beer and spills it all over the floor.

Nick: PARTY FOUL!
by ninja girl June 28, 2004
 
2.
1. An action committed by an individual, either on purpose or not, that goes against the feel of the party or bar atmosphere.
2. To spill an alcoholic drink.
1. Going to a costume party with no costume
2. "Shit, you got that all over me. Party foul."
by B-flip and Skeet June 29, 2004
 
3.
The new catchy catch phrase that everyone is just itching to use! Someone drops their drink? Be sure to be the quickest to blurt out "OHHH, PARTY FOUL" and you win extra cool points with all the ladies, and possibly the men too! Practice being quick off the mark by dropping glasses in your own home! Try to train yourself to say it reflexively on hearing the glass shatter! Then open your wrists with a shard from that glass and try again! Repeat until dead!
Jenny drops her drink at the bar!
<EVERYONE> OHHHHH, PARTY FOULLLLLLLL!!
by The Number One Foul Caller October 01, 2005
 
4.
when someone fucks up at a party by dropping beer or breaking something or falling.
::drops beer::

everyone: "Party Foul!"
by sk September 07, 2003
 
5.
An incident at a party that disrupts the flow.
Examples of a Party Foul include dropping your drink, being a tool, yacking on the floor, dancing like a tool, hitting on an ugly broad, popping your collar, wearing excessive pink, not holding a beer, and refusing to funnel or shotgun a beer. You can see these examples at PartyFouls.com
by Party Foul April 24, 2006
 
6.
A moment during a social gathering when one does something embarrassing and/or stupid.
"Dude, I just spilled my drink all over Sarah's lap!"

"Wow..major party foul."
by Whaaaat?! January 04, 2009
 
7.
1. A mistake at a party e.g. someone stepping on someone elses foot, somebody bumping into people, somebody spilling beer everwhere, accidental cigarette burn, or when someone fumbles the pipe.
"Did you see the way they dropped me on that last kegstand? Major partyfoulers they are."
by Sean McReynolds February 03, 2004