People who attend an event without invitation or permission, especially a party or social gathering. Can also refer to things that break or destroy by impact.
From Middle English 'crasshen' meaning 'to break noisily'. The social meaning of uninvited guests emerged in American slang during the 1920s party culture.
The term perfectly captures both the sudden, disruptive nature of uninvited arrival and the potential chaos that follows. It reflects the Jazz Age's rebellious spirit when social conventions were being boldly challenged.
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