Nico Nico Nii is the signature catchphrase of Nico Yazawa, a character from the anime Love Live! School Idol Project, first broadcast in 2013. In the series Nico performs the line with a distinctive pose and heart gesture, and fans quickly adopted it as her defining moment. The phrase spread through anime communities, YouTube edits and TikTok, where creators remixed it into songs, sound effects and parodies. Car-style versions play on the bright, musical delivery, turning it into a horn-like joke that still signals Nico instantly to anyone familiar with the show.