Mic drop refers to the action of deliberately dropping or tossing aside one's microphone at the end of a performance or speech one considers to have been particularly impressive, but it's more likely to be figurative - or an exclamation to emphasize a particularly impressive point.

“扔麦克风”是指在表演或演讲结束之际故意地摔掉或扔掉麦克风的举动，以此来引人瞩目。但这多是具有象征意义的，或是为了强调某一令人称奇的观点而表达的惊叹。

The mic drop has been employed by rappers and comedians since the 1980s, and it's grown steadily in popularity since 2007, but it's only in the last year or so that it's become a meme throughout American culture. And no single person has been associated with the mic drop more frequently than the US president Barack Obama.

上世纪80年代以来，说唱歌手和喜剧演员就会“扔麦克风”，这种行为自2007年开始越来越流行，但只在过去一年左右的时间里，它才成为美国文化的弥因。没什么人会比美国总统奥巴马更频繁的被与“扔麦克风”联系在一起的了。