Rude Buster is Susie's signature rude spell in Deltarune, the indie role playing game created by Toby Fox and first released with Chapter 1 in 2018. Costing TP in battle, it sends a powerful axe projectile at a single enemy and became one of the most clipped combat effects from the game. As Deltarune fan videos, battle recreations and meme edits spread on YouTube and social platforms, creators began isolating the hit sound on its own for other fight scenes.