Definition of "gatecrash" [gate•crash]

• To attend a social event without having been invited, or without having paid. (verb)

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• "Officials suspect the new members will attempt to "gatecrash" congress, despite not having registered in time."
• "The high heart of the gatecrash is a dimness here—he is muddled and wrung out and can’t get his bad-ass glare to function."
• "Pakistan felt this was a G-4 attempt to "gatecrash" into Security Council as Permanent Members."