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An event, gathering, or situation characterized by laughter, especially one organized for this purpose.
1960s; earliest use found in The Los Angeles Times. From laugh + -in, after e.g. sit-in.
雅致网英汉双解词典包含236457条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。