flash-mobbing

美

英

英英

n.	1. the practice of people appearing in groups in public places after being mobilized by somebody on the Internet and performing harmless attention-seeking activities

随便看

英汉双解词典包含2704715条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。