The clip circulates on Japanese soundboards with the phrase sushi no nioi ga suru, meaning it smells like sushi, and is tagged to Undertale because of Undyne, the fish like spear wielding character from Toby Fox's 2015 role playing game. The uploader credit is Soujiro and the file title adds a wish to eat sushi with Undyne, framing it as a fan joke rather than an official game line. Its short length and specific food reference made it easy to repost as a reaction button, where the humor comes from applying a very literal smell comment to unrelated scenes.