PPAP stands for Pen-Pineapple-Apple-Pen, the viral song by Japanese comedian and performer Piko-Taro. The short music video exploded online in 2016 thanks to its simple dance, repetitive lyrics and easy-to-quote hook. It spread widely through YouTube, social media reposts and remix culture, then stayed popular as a shorthand for random, catchy internet humor. People still use the clip in nostalgic edits, parody videos and sudden musical punchlines because the concept is instantly understood.