Party foul refers to something that goes wrong at a party, this something can be stupid, embarrassing, or simply unacceptable. Examples of this include spilling drink on someone, breaking a lamp, throwing up, choking on a shot, etc.

Party foul指开派对的时候不小心发生的“小插曲”，这样的事件可能是愚蠢的、让人尴尬甚至无法接受的。比如：把饮料洒在别人身上、打破现场的灯泡、在派对现场呕吐，以及喝酒的时候被呛到，等等。由此，中文可译为“派对出丑”。

When a party foul was committed, sometimes people may stare or it gets very quiet; or other times some one might yell, "Party foul!" And everyone will laugh.

有上述出丑事件发生的时候，有时候人们会突然安静下来，盯着你看；有的时候会有人喊一声“party foul”，然后大家就哄堂大笑。