Sentence:  The idea was to append Keyboard Cat to the end of a blooper video to "play" that person offstage after a mistake or gaffe, like getting the hook in the days of vaudeville. The <WSD>meme</WSD> became popular, Ashton Kutcher tweeted about it to more than 1 million followers, and more than 4,000 such videos have now been made. 
Meaning of the word marked with <WSD> tags:  Something, usually humorous, which is copied and circulated (online) with slight adaptations, including (quizzes), basic (pictures), video templates etc. (from 1993)