Gerson is the elderly turtle monster created by Toby Fox, first known as the Waterfall shopkeeper and retired Hammer of Justice in Undertale from 2015, then referenced and expanded in Deltarune. Fans latched onto his blunt, grandfatherly lines because they mix real lore wisdom with dry comedy. This particular boom is old moment circulated on soundboards and in edits as a shorthand for an experienced character dismissing hype, and it stays popular because Deltarune players recognize the voice and attitude immediately.
このサウンドについて
Gerson saying boom is old is a short Deltarune voice line meme from the veteran shopkeeper Gerson, used for funny old man moments and reaction edits.
This clip captures Gerson from Deltarune delivering the line about boom being old in his gruff, amused old-turtle voice. It is brief and dry, with the humor coming from the blunt way he dismisses something as past its prime while sounding completely unbothered. The delivery feels like a wise veteran teasing a younger character, which makes the moment instantly quotable. Viewers hear it as both a character beat and a punchline, the kind of flat, confident statement that lands harder because Gerson says it like it is simple fact.
