Heathcliff is one of the Sinners in Limbus Company, the turn-based role-playing game where players guide a team through a distorted city. His loud, brash delivery made short lines like Yappaima easy to lift from gameplay and share as reaction clips. Fans began using the shout in edits, streams, and meme videos to signal confidence, aggression, or a sudden turn in a fight. Because the clip is so short and instantly recognisable to players, it remains a handy sound for creators who want a punchy game voice without a long setup.