This sound is listed as Dull Thud and credited in the file metadata to Gregory Weir. It is best understood as a general-purpose stock impact effect rather than a quote or character audio. Short blunt hit sounds like this spread widely through meme edits, gaming clips, and reaction videos because they communicate contact without sounding too violent or over-the-top. Creators still use them when a louder option like a metal pipe clang would feel exaggerated for the visual gag.